I

. .1

Biolog 202

Quiz I - chemistrl 1/31t03

:ather than 31. Hor i 'minv, .{ rairoactive isotope of sulfur has the mass number 35

:e..rlrons does sulfur 35 have?

a,. i5 br- 19 c r . 32 d). -15

2. A covaient bond is iikeil' to be poiar if:

a). one of the atoms sharing electrons is much more electronegative than the other atomb). the two atoms sharing electrons are equally electronegative

c). the two atoms sharing electrons are of the same element.d). it is between two atoms that are both very strong elgctron acceptors

3. The smallest unit of matter with unique characteristics isa) an electron b) a moleculec), an atom d) the nucleus

The number of electrons of an atom is automatically known if one knofs theatomic number

number of orbitals

a) hydrogen

c) double

a) cation

c) molecule

8. What type bf bonding exista) covalent bonds

cliydrogen bond

9. Define Atomic mass

\ame

. b) atomic weight

d) valence

b) ionic

p,covalent .'

b) anion

d) none of the above

between water molecules

b) Ionic bonds

d) Van der waal forces

\ i \i

4.

?),eJ

5. Bonds in which atoms share electrons are defined as bonds,"-*

7. An atom that donates electrons during a reaction is called

10. An electrically neutral atom bears what trait?a) It contains protons in its nuclewb) It contains the same no. of protoos and neutrons

,:, It contains the same no. of pmtons and electronsd) It contains electrons it its electron shell

Name8 /27 107

one altemative that best comDletes the statement

. 1) !frich four elements make up approximately 96/o of living matter?( e|.arbon, hy drogery nitrogen, oxygen-6) carbon, sulfu1 phosphorus, hydrogen

C) oxygen, hydrogen, calcium, sodiumD) carbon, sodium, chlorine, magnesiumE) carbon, oxygen, sulfur, calcium

Bio207Quiz - ChemistryMULTIPLE CHOICE. Choose the

Atom 1tH1

the question.

E)8

or answers

02) FEmass number of an element can be easily approximated by adding together the number of

(A) drotons and neutrons.\Glectron orbitals in each energy level.C) protons and electrons.D) neutrons and electrons.E) isotopes of the atom.

3) The atomic number of neon is 10. Therefore, itA) has 8 electrons in the outer electron shell.B) is inert.

;Qhas an atomic mass of 10.

(!)bnty A and B are correct.E) A, B, and C are correct.

4) Which of the following best describes the relationship between the atoms described below?Atom 2

3H1

A) They are isomers.B) Thev are polvmers.

1cf1n"y u." iroiop"t.YfThey a.e iotts.

E) They are both radioactive.

Use the int'ormation extracted lrom the periodic table in Figure 2.2 to ansu)er the following questions.

Atomic number-> [t El fl---] El El E;lIC|Oi lHi lN|s i lPlAtomic mass -> t! L9_-l f- l [ ,i Lti_,] !:_j

Figure 2.2

5) How many electrons does sulfur have in its valence shell?A)1 B)2 c)4

5) A covalent chemical bond is one in whichA) electrons are removed from one atom and transferred to another atom so that the two atoms become

oppositely4Eteed.

,,B\Protonsot'.n1utrFsaresharedbytwoatomssoastosatisfytherequirementsofboth.( CDuter-shel\el$irohs are shared by two atoms so as to satisfactorily fill the outer electron shells of both.\ -z\ \

D) outer-shell dt€Ctrqrls of one atom are transferred to the inner electron shells of another atom.E) the inner-sheli\leilions of one atom are transferred to the outer shell of another atom.

7) What are thehydrogen?A)1

maximum number

,-\(y)of covalent bonds an element with atomic number 16 can make with

c)3 E)J

E)O-O

E) NH4CI

8) Which of the following represents a polar cogLRnt bond?A)H-H B)c-c gyo

9) The ionic bond of sodium chloride is formed when

@ chlorine gains an electron from sodium.-B) sodium and chlorine share an electron pair.

C) sodium and chlorine both lose electron; from their outer valence shells'D) sodium gains an electron from chlorine.E) chlorine gains a proton from sodium.

V0) Which atom is the calioe in ammonium chloride salt?tr f iNHa ( Ilcr c)H

\) \--l

D)4

D)C-H

D)N

1-!y'A given solution is found to contain 0.0001 mol of hydrogen ions (H+) per liter. Which of the following bestdescribes this solution?

A) acidic: H+ acceptor

B) basic: H+ acceptor

@acidic: H+ donor

D) basic: H+ donorE) neutral

r-gfBuffers are substances that help resist shifts in pH by

- A) releasing H+ in acidic solutions.

) ,/\.' (B) )eleasing H- in basic solutions.

t C) releasing OH- in basic solutions.

D) combining with OH- in acidic solutions.. - r

- -+ . ,E) combining with H- in basic solutions.

._!of Which bonds must be broken for water to vaporize?A) ionic bondsB) nonpolar covalent bondsC) polar covalent bonds

@irydrogen bondsE) Both C and D are correct.

) ry )r t/1

7-{ C {4

Bio?02Quiz - waterMULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question,

1) In a single molecule of water, the two hydrogen atoms are bonded to aA) hydrogen bonds.

,Q nonpolar covalent bonds.(p polar covalent bonds.D) ionic bonds.E) van der Waals interactions.

2) Which of the following is an example of a hydrogen bond?

atom by

p the bond between C and H in methane(p)the bond between the H of one water molecule and the O of another water moleculeC) the bond between Na and Cl in saliD) the bond between two hydrogen atomsE) the bond between Mg and Cl in MgCl2

Which of the following is possible due to the surface tension of water?A) Lakes don't freeze solid in the winter, despite low temperatures.

@A waterstrider can walk across a small pond.C) organisms resist temperature changes although they give off heat due to chemical reactions.D) Water can act as a solvent.E) The pH remains neutral.

Which bonds must be broken for water to vaDorize?A) ionic bondsB) nonpolar covalent bondsC) polar covalent bondsAi(gr, nydrogen bondsE) Both C and D are correct.

6)

Temperature usually increases when water condenses. Which behavior of water is most directly responsibkfor this phenomenon?A) change in density when it condenses to form a liquid or solid

,p reactions with other atmospheric compounds

$) release of heat by the formation of hydrogen bondsD) release of heat by the breaking of hydrogen bondsE) high surface tension

Ice is lighter and floats in water because it is a crystalline structure held together byA) ionic bonds onlv.

z6\ '\9f nyoroSen Donos only.

C) covalent bonds only.D) Both A and C are correct.E) A, B, and C are correci.

r f\\Nu*u f-0Juf(l4 )hqfp8t31.i-

single oxygen

0

4\

5)

q\

10)

Life on Earth is dependent on all the properties of water as well as the abundance of water. Which propertyof water is probably most important for the functioning of organisms at the molecular level?A) cohesion and high surface tensionB) high specific heat

A given solution is found.{o3ontain 0.0001 mol of hydrogen ions (H+) per liter. Which of the following bestdescribes this solution?

( A)acidic: H+ acceptor

$ basic: H+ acceptor

6)acidic: H+ donor

)/busi., H+ donorE) neutral

What would be the pH of a solution with a hydrogen ion concentra.tion [H+1 of t0-8 M?A)pHz B)pHa c)pH6 @)pHs E)pH10

Buffers are substances that help resist shifts in pH by. - ,+.A) releasrnE H rn acldlc sotutlons.

a:\ . . -+. ,\€J,rreleasrng r r rn Dasrc solu ons.

C) releasing OH- in basic solutions.

D) cornbining with OH- in acidic solutions.. . r . .+ . ,E) combining with H- in basic solutions.

" Cn ̂ y l . ,c ' 'o ' ,7 l ' "o--, : :n: ' !kt /qt,n .1o( (ece;v4. rc+l {^

N^ " Anrng .Z/l,tt

*;i+*r#!.,3":,;j,;Jk^{"K6&.i"?i,?,*"statementoranswersthequestion.

e).6rganic chemistry is a science based on the study ofA) functional groups.B) vital forces interacting with matter.

/4\F-iDcaroon comPoun(rs.DI water and its interaction with other kinds of molecules.E) the properties of oxygen.

v Z) Which property of the carbon atom gives it compatibility with a greater number of different elements thanany other type of atom?A) Carbon has six to eight neutrons.rf)Carbon has a valenc-e of 4.tfcurbon forms ionic bonds.D) Only A and C are correct.E) A, B, and C are correct.

r-,O What type of bonds does carbon have a tendency to form?A) ionicB) hydrogen

/t)YovalentYonlv A u.rd B are correct.

E) A, B, and C are correct.

c)4

H

E)8D)5

HI ,H

Hi/

H. )c:c/ \ut \H

H' IH

"l D'

' . , '"ta:a/t,

Figure 4.3

,--51'The two molecules shown in Figure 4.3 are best described asA) enantiomers.B) radioactive isotopes.C) structural isomeqs.p),ponisotopic isomers.

Qleometric isomers.

Lrey'Wht.h t" ,he best description of a carbonyl group?A) a carbon and hydrogen atomB) an oxygen double-bonded to a carbon and a hydroxyl groupC) a nitrogen and a hydrogen bonded to a carbon atornD) I sulfur and a hydrogen bonded to a carbon atoma. I(EJy' carbon atom ioined to an oxygen atom by a double bond

q;D4o* -u.ty

rtructural isomers are possible for butane having the molecular formula C4H19?

A)1

tg' ' " \o_,

Figure 4.4 '.-.*"

$acetyl,-fWyrutis the name of the functional group shown in Figure 4.4?

A) carbonyl <Bf,methyl - '/aenyaloxyt @carboxyl

Which two functional groups arc always fotnd in amino acids?A) amine and sulfhydrylB) carbonyl and carboxyl

6 carboxyl and amine '

Y) alcohoi and aldehvde'Elketone and amine

r' 9) Which functional groups can act as acids?A) amine and sulftrydrylB) carbonvl and carboxyl

.-\ -Q)larboxyl and PhosPhateD) alcohol and aldehydeE) ketone and amino

, ard *"is the reason why hydrocarbons are not soluble in water?

QJh"y are hydrophilic.

@y'he C-H bond is nonpolar.C) The C-H bond is polar.D) They are large molecules.E) They are lighter than water.

t l

BIo202Quiz 3 - CarbonMULTIPLE CHOICE. Choose the one altemative that best completes the statement or answers the question.

\!z 1) Organic chemistry is a science based on the study of A

/ A)functionalgroups. €J. I B) vital forces interacting with matter.V @)carbon compounds.

)l water and its interaction with other kinds of molecules.E) the properties of oxygen.

ilffi#rdusr""-

2) How many electron pairs does carbon share in order to complete itgalence shell?A)1 B)2 c)3 (qt4

3) The carbon present in all organic molecules

'E)s

A) is incorporated into organic molecules by plants.

, B) is processed into sugars through photosynthesis.

- I C)is derived from carbon dioxide.I ai

\ (Q) two of the above.'

Q) all of the above.

4) What is the reason why hvdrocarbons are not soluble in water?//:r -, W ft"y are hydrophilic.

-- | {$ The C-H bond is nonpolar.\ C) The C-H bond is polar.

D) They are large molecules.

@z c)4 D)5

| 6) Which of the following is frae of geometric isomers?l^

| @) They have variations in arrangement around a double bond.

\ I B) They have an asymmetric carbon that makes them mirror images.w C) They have the same chemical properties.

D) They have different molecular formulas.E) Their atoms and bonds are arranged in different sequences.

7) Which is the best description of a carbgnyl group?

1 A) a carbon and hydrogen atom

I B) an oxygen double-bonded to a carbon and a hydroxyl group

\) C) a nitrogen and a hydrogen bonded to a carbon atomD) a sulfur and a hydrogen bonded to a carbon atom

@a carbon atom loined to an oxygen atom by a double bond

8) Which functional groups can act as [6ii]A) amine and sultiydryl x

1 @carbonyl and caiboxyl-- \ Qcarboxyl and phosphate

\ D) alcohol and aldehydelE) ketone and amino X

- \

I 10)

9) A carbon skeleton is covalently bonded to both an amino group and "

gglgylgT"P When placed in

water,A) it would function only as an acidbecause of the ca;!o1yl group'

B) it would function only as a base because of the amino group.(O it would function as neither an acid nor a base.

l$ it would function as both an acid and a base.

E) it is impossible to determine how it would function.

Figure 4.4

What is the name of the functional group shown in Figtte 4.4?

A) carbonyl B) methyl C) dehydroxyl @carboxylE) acetyl

;-) Dehydration reactions assemble polymers, and hydrolYsis breaks them down

Laa4fub-Quiz 4- Macrornolecules 2174105tiUfTUrfn CUOICE. Choose the one alternative that b€st completes the statement or answers the question'

reactions and hydrolYsis?

B) 827 glucose molecules'

C) 828 glucose molecrrl€s and no water molecultls'

D) 828 Slucose molecules and 828 water molecules'/ -- v E) 827 glucose molecules and 827 water molecules'

4) Which of the followiirg are polysaccharides?

A) RNA and DNA

B) cholesterol and tdacylglycerol

@D) uracil and thymine

E) glYcogen and starch

1) Which of the

B)C) Dehvdration reactions can occur only after hydrolysis'

D) Hydrolysis occurs dudng the day, and dehydration reactions happen at

E) Dehydration reactions occur in Plants, and hydrolysis happens in animals'

2) Carbohydrates normally function in animals as

A) enzymes in the regulation of metabolic processes'

B) the functional units of liPids.

E)sites of Protein synthesis

fo) Consider a polysaccharide consisting of 828 glucose molecules. The total hydrolysis of the polysaccharide

would result in the Production of

I

l-5) Which of the following is lrze qfboth starch and cellulose?

@B)Jh61re both

"sed for energy storage in Plants'

C) They are geometric isomers of each other'

D) They are both structural comPonents of the Plant cell wall'

E) They can both be diSested by humans.

6) What is a fat or tdacylslycerol?

A) a kind of lipid that makes uP much of the plasma membrane

B) a molecule formed from three alcohols

C) a carbohydrate with three sugars

lglt of triglycerides.

D) a protein with tertiary structure

7l Which of the following is true conceming satuated fatty acids?

A) They are the predominant fatty acid in corn oil.

produced by plants.

are usually liquid at room temPerature.

fl They have double bonds between the carbon atoms of the fatty

8)

A)an increase in the number ofhydrogm atoms in the oil molecule' I

B) rj'e oil being a solid at room temPerature' / \

C) a decrease in the number of carbon-carbon double bonds in the oil molecules'

' E) all of fhe abovC.

10) Which tyPe oI liPid is most imPortant in biological membranes?

A) uiglyceride B) fat C) oil

;)"-i-i-i ii-i-i ii-i iii-l-"Figure 5.2

What is the molecule illustrated in Figure 5.2?

A) an unsaturated fatty acid

C) a polyunsaturated triglycedde

D) a common comPonmt of Plant oils

E) similar in structure to a steroid

9) The hydrogenation of vegetable oil would result in

-MULTIPLE CHOICE. Choose the one altemative that best completes the statement or answers the question.

1) Carbohydrates normally function in animals asA) the functional units of lipids.B) enzymes in the regulation of metabolic processes.C| a component of triglycerides

@ energy-storage molecules.E) sites of protein synthesis.

A) connecting monosaccharides together.B) the addition of water to each monomer.

,dlhe .e-oval of water (dehydration reactions).Y) ionic bonding of the monomers.

2) Polymers of polysaccharides, fats, and proteins are all synthesized frgr{monomers by

\X) the formation of disulfide bridges between monomers.

3) Consider a polysaccharide consisting of 828 glucose molecules. The total hydrolysis of the polysaccharidewould result in the production ofA) 827 glucose molecules.B) 827 water moledes.C) 827 glucose molecules and 827 water molecules.D) 828 glucose molecules and 828 water molecules.(p828 glucose molecules and no water molecules.

What is a fat or triacylglycerol?A) a protein with tertiary structure

lipid made of three fatty acids and glycerolkind of lipid that makes up much of the plasma membrane

D\a molecule formed from three alcoholsE)a carbohydrate with three sugars

TTT?TTi\ i \ , :H-c-c-c:c-Q-Q-q-c:c-9-c.

l l l l , l l 'o*Figure 5.3

\

4)I

5) The molecule shown in Figure 5.3 is a

@ PolYsaccharide.B) polypeptide.€).saturated fatty acid.E) nucleic acid.E) unsaturated fatty acid.

6) Which type of lipid is most important in biolggical membranes?A) fat B) wax @/phospholipid D) oil E) triglyceride

{ 1) In a single molecule of water, the two hydrogen atoms are bonded to a single oxygen atom byA) hydrogen bonds.

,B\nonpolar covalent bonds.

tldolar covalent bonds.f D)-jrlnic bonds.

F van der Waals interactions.

,"b!,,.f Wtu.h ot the following is an example of a hydrogen bond?

- A\he bond between C and H in methane

,tsfhe bond between the H of one water molecule and the O of another water molecule*Ci-the bond between Na and Cl in salt

D).the bond between two hydrogen atomsElthe bond between Mg and Cl in MgCl2

X 3) V)(!er is transported in plant tissues against gravity due to which of the following properties?

e/:l*:"b) adnesronC) hydrogen bondingD) two of the above

/D a[ of the above

9.41 The nutritional information on a cereal box shows that one serving of Cheese Pizza has 500 calories(aciually kilocalories). If one were to burn a serving of cereal, the amount of heat given off would besufficient to raise the temperature of 1 kg of water how many degrees Celsius?A) O.s'c B)i.O'c c) 50.0.c '@noo.xc

E) 5000.0'c

.r.-{The tormation of ice during colder weather helps temper the seasonal transition to winter. This is mainlybecause(A))he formation of hydrogen bonds releases heat.ts) the formation of hydrogen bonds absorbs heat.C) there is less evaporative cooling of lakes.D) ice melts each autumn aftemoon.E) ice is warmer than the winter air.

'{ 6) Why does ice float in liquid water?A) The liquid water molecules have more energy and can push up the ice.B)The ionic bonds between the molecules in ice prevent the ice from sinking.

(e) Ice always has ait bubbles that keep it afloat.(Q) Uydrogen bonds keep the molecules of ice farther apart than in liquid water.

\The crystalline lattice of ice causes it to be denser than liquid water.

t fOne mole (mol) of a substance is equal to

A\ 6.02 x 10zo molecules of the substance.B) 1 g of the substance dissolved in 1 L of solution.C) the largest amount of the substance that can be dissolved in 1 L of solution.D) the molecular weight of the substance expressed in grams. One mol of glucose (C6H12O5) is equivalent

to 180 g of glucose.

@Answers A and D are correct.

7) Which of the following are polysaccharides?A) RNA and DNA

@glucose and sucrose \p cholesterol and triacylglycer ol /-' \pllycogen and starchE) uracil and thymine

8) Af l of the following molecules are carbohydr ales excmtA) lactose. B) cellulose.

@hemoglobin. D) glycogen. E) starch.

9) Carbohydrates generally have a molecular formulaA) that includes a -SH group.q]ll whit ci$on, hyaroger,, and oxygen are present in a ratio of 1:2:1.

-L, tnat lnctudes a _NH2 group. \

Qthat includes at least one hydrocarbon tail. -' \

E) in which carbon, hydrogen, and oxygen are present in a 2:1:2 ratio.

ft l*o ring forms of glucose (c and p){(y are made from different structural isomers of glucose.\rrise from different linear (nonring) glucose m-olecules.

10)

R :::: l^Tl-l lt:rent carbons of thi li-near structure loin to form the rings.E) arise because the hydroxyl group at the point of rr"s .r.r"." ;";"ir"!o?it"

"r,r,". one of two possiblpositions.

E) include an aldose and a ketose.

Bio202Quiz 4 - macromoleculesMULTIPLE CHOICE. Choose the one altemative that best completes the statement or answers the qu€stion'

1) Pol),rners of Polysaccharides, fats, and Proteins are all synthesized hom monomers by

N"^"Sr!.t+.!n H{r,c,it v2170106

A) ionic bonding of the monomers.

B) the addition of water to each monomer. -..,C) connecting monosaccharides together. '/'

pf the formation of disdfide bridges betwem monomers.

/ E)ihe removal of water (dehydration reactions).

2) Carbohydrates normally function in animals as

A) the functional units of liPids.

i) enzymes in the regulation of metabolic Process/es.

(c) |nergy-storage molecules.

bfsites of protein sYnthesis.

[) a component of triglYcerides.

3) Consider a polysaccharide consisting of 828 glucose molecules. The total hydrolysis of the polysaccharide

#sLld result in the Production of

t),827 water molecules.

\B) 827 glucose molecules and 827 water molecules.

-/ \C) 828 glucose molec.ules and 828 water molecules.

@828 glr.ot" tnolecrdes ard ng water molecules.

E) 822 glucose molecules.

4) Which of the following is fnie of both starch and cellulose?

($They are both polymers of glucose.

B) They are both structural comPonents of the Plant cell ylYC)They are both used for energy storage in PIants.

D) They are geometric isomers of each other.

E) They can both be digested by humans.

5) What is a fat or triacylglYcerol?

A) a carbohydrate with three sugars

@! lip;a made of three fatty acids and glycerol

C) a molecule formed from three alcohols

D) a protein with tertiary structure

E) a kind of lipid that makes up much of the plasma membrane

TTTT?-t-f-?HHHH

^HHH"r \ l l l-c-c-c-c, / t t lHO i i lA

HHHHH

l-l-l-f-l-"r t t l lHHHHH

HI

IH

tlIIH

Figure 5.2

6) What is the molecule illustrated in Figure 5.2?

A) a common component of Plant oils..-.{\(9)A saturated fatty acid

C) similar in structure to a steroid

D) an unsaturated fatty acid

E) a polyunsaturated triSlyceride

7) The hydrogenation of vegetable oil would result in

A) the oil being a solid at room temPerature.

B) a decrease in the number of carbon-carbon double bonds in the oil molecules'

C) an increase in the number of hydrogen atoms in the oil molecule'

8) What is the structure shown in Figure 5.4?

A) a nucleic acid polymer

B) a stardr molecule

C) a cellulose molecule

D) two of the above.

$ aI of the above.

a:: t - ) tA' - :

Ia' \steroid

protein

9) Which of the following best summarizes the relationship between dehydration reactions and hydrolysis?

A) Hydrolysis creates monomers, and dehydration reactions destroy them'

B) Hydrolysis occurs during the day, and dehydration reactions haPPen at night'

C) Dehydration reactions occur in Plants, and hydrolysis happens in anigrrdls'

@ehyaration ,eactions assemble polymers, and hydrolysis breaks t/em down'

E) Dehydration reactions can occur only after hydrolysis.

10) {hidr type of lipid is most important in biological membranes?

ffi)hospholipid B) triglyceride C) wax\)

Figure 5.4

D) fat E) oil

Bio202Quiz 4 - MacromoleculesMULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

1) Polymers of polysaccharides, fatt and proteins are all synthesized from monomers byA) connectint monosaccharides together.

P) the addition of water to each monomer.

$ the removal of water (dehydration reactions). './D) ionic bonding of the monomers.E) the formation of disulfide bridges between monomers.

2) f{hich of the following best summarizes the relationship between dehydration reactions and hydrolysis?

VD Dehydration reactions assemble polymers, and hydrolysis breaks them down. "B) Hydrolysis occurs during the day, and dehydration reactions happen at night.C) Dehydration reactions can occur only after hydrolysis.D) Hydrolysis creates monomers, and dehydration reactions destroy them.E) Dehydration reactions occur in plants, and hydrolysis happens in animals.

Figure 5.13) If 100 molecules of the general type shown in Figure 5.1 were covalently joined together in sequence, the

single molecule that would result wouid be a($ polysaccharide.Y) polypeptide.C) polyunsaturated lipid.D) nucleic acid.E) fatty acid.

4) Fhich of the following is lraeof both starch and cellulose?\A) They are both polymers of glucose.B) They are geometric isomers of each other.C) They can both be digested by humans.D) They are both used for energy storage in plants.E) They are both structural components of the plant cell wall,

5) What is a fat or triacylglycerol?

r,A] a protein with tertiary structure\B) a lipid made of three fatty acids and glycerolC) a kind of lipid that makes up much of the plasma membraneD) a molecule formed from three alcoholsE) a carbohydrate with three sugars

" i i i_ i i i i i : i_ i_"<"H-i-i-c:c-i-i-i-':"*i*\,

rrgure r.J

The molecule shown in Figure 5.3 is aA) polysaccharide.B) polypeptide.C) saturated fatty acid.D) nucleic acid.

\P) unsaturated fatty acid.

7) The 20 different amino acids found in polypeptides exhibit differmt chemical and physical propertiesbecause of differentA) carboxyl groups.

_-8.) amino groups.(!)side chains (R groups).D) tertiary structure.E) Both A and B are correct.

HAC CHA" \,,' -HCH O

- l l l lc-loH HfN-c-c-oHi l t lo H2o H

Figure 5.5

OHI

H CH"t t -

H-N-C-IH

8) The chemical reactions illustrated in Figure 5.5 result in the formation of

\Q peptide bonds.B) ionic bonds.C) glycosidic bonds.D) hydrogen bonds.E) an isotope.

Which type of interaction stabilizes the o-helix structue of proteins?A) hydrophobic interactions

(E nonpolar covalent bonds€) ionic interactions tphydrogenbonds IE) polar covalent bonds

,,lf ) At which level of protein structure are interactions between R groups most important?

/ ($) primary' B) secondary a- |

lptertiary I

b) quatemaryE) They are equally important at all levels.

Bio202

Quiz - Macromolecules 2MULTIPLE cHOIcE. Choose the one alternative that best completes the statement or answers the question.

1) The 20 different amino acids found in polypeptides exhibitbecause of differentA) carboxyl groups.B) amino groups.

(e) side chains in groups).D) tertiary structure.E) Both A and B are correct.

2) What maintains the secondary structure of a protein?A) peptide bonds

@ hydrogen bondsC) disulfide bridgesD) ionic bondsE) electrostatic charges

different chemical and physical properties

C) bonding of two amino acids together to form a dipeptide.

--DLbadstiogola'peptide ehain-intoa*r-c,.+€Iix-@three-dirr.rensional shapq.\-/

4) what would be an expected consequence of changing one amino acid in a particular protein,/A) The primary structure would be changed.B) The tertiary structure might be changed.C) The biological activity of this protein might be altered.D) Only A and C are correct.

@ A, B, and C are correct.

5) The R group or side chain of the amino acid serine is -CH2-OH. The R group or side chain of the aminoacid alanine is -CH3 Where would you expect to find these amino acids in globular protein in aqueoussolution?A) Serine would be in the interior, and alanine would be on the exterior of the globular protern.@ Alanine would be in the interior, and serine would be on the exterior of theitoUutar proteinC) Both serine and alanine would be in the interior of the globular protein.D) Both serine and alanine would be on the exterior of the globulaiprotein.E) Both serine and alanine would be in the interior and on the exterior of the globular protein.

Which of the following besl describes the relationship between proteins, RNA, DNA, and genes in humans?e) DNA --+ genes ---+ RNA ...' proteinsB) RNA --* DNA --- genes ---' prorerns

@ proteins--* RNA --+ DNA .- genesD) genes -* RNA ---+ DNA ---r prorernsE) genes

- proteins * RNA * DNA

ni r)il"-iltEidqd-

v'

. \,/

7) which of the following descriptions besl fits the class of molecules known as nucleotides?A) a nitrogen base and a phosphate $oupB) a nitrogen base and a five-carbon sugar

@ a nitrolen base, a phosphate group, and a five-carbon sugar ltD) a five-carbon sugarE) a five-carbon sugar

or uracilor pyrimidine

$A sequence of a DNA pc

C\+fr6o .ytorine and t6oof 80 purines and 80 pyrimidines could have

TV

E) both B and C.

The difference between the sugar in DNA and the sugar in RNA is that the sugar in DNA6) contains less oxvgen.

@can form a doubli-stranded molecule.C) has a six-mernbered ring of carbon and nitrogen atoms.D) can attach to a phosphate, unlike the sugar in RNA.E) is a six-carbon sugar and the sugar in RNA is a five-carbon sugar.

*f10) The structural feature that allows DNA to replicate itself is the

A) sugar-phosphate backbone.

@ complementary pairing of the bases.C) phosphodiester bonding of the helices.D) twisting of the molecule to form an a-helix.E) three-part structure of the nucleotides.

,';t'l/c,

o

c/

Bio202Quiz - Macromolecules

Nu*"----A:o:.":!-- L-:14-2119 /07

MULTIPLE CHOICE. Choose the one altemative that best completes the statement or answers lhe question.

\J 1) Polymers of polysaccharides, fats, and proteins are all synthesized from monomers by

A) ionic bonding of the monomers.

B) the addition of water to each monomer.

\$),lhe removal of water (dehydration reactions).

D) the formation of disulfide bridges between monomers.

E) connecting monosaccharides together.

2) Carbohydrates normally function in animals as

A) a component of triglycerides.

@lnergy-storage molecules.

C) enzymes in the regulation of metabolic processes' -

D) sites of protein synthesis.

E) the functional units of lipids.

3) )\ich

of the following are polysaccharides?

Q)BlYcoBen and starch

.. B) cholesterol and triacylglycerol

tsIRNA and DNA

't...\glucose and sucrose

E\racil and th)'rnine

4) Which oI the following is trre of both starch and cellulose?

A) They can both be digested by humans.

B) They are both structural comPonents of the plant cell wall'

C) They are geometric isomers of each other.

D) They are both used for energy storage in Plants.

Q) They are both polymers of glucose.

Which of the following is t/ s concerning saturated fatty acids?

A) They are the predominant fatty acid in corn oil.

B) They have double bonds between the carbon atoms of the fatty acids.

C) They are usually produced by plants.

D) They are usually liquid at room temPerature.

c,

@)hey have a hlgher ratio of hydrogen to carbon than do unsaturated fatty acids.

HHHHHHHHHr l t t t l l l l

H-c-C -C:C-c-C-C-C:Ct l l l lHH HHH

Hnt/ /l \

,r, oHt-t

.6) The molecule shown in Figure 5.3 is a

A) polysaccharide.

B) saturated fattY acid.

C) polweptide.

Q) unsaturated fattY acid.

E) nucleic acid.

Figure 5.3

7) Which type of liPid is most imPortani in biological.membranes?

A) fat B) oil C) wax D) triglyceride @phospholipid

8) Which of the following illustrates hydrolysis?

\the reaction of a fat to form Slycerol and fatty acids with the release of water

(Bl the reaction of a fat to form glycerol and fatty acids with the utilization of water

dthe synthesis of a nucleotide from a phosphate, a ribose sugar, and a nitrogen base with the production of a

holeorle of water

\he reaciion of two monosaccharides to form a disaccharide with the release of water

E) the svnthesis of two amino acids to form a dipeptide with the utilization of water

9)- The two ring forms of glucose (cr and p)

)il-{rise from different linear (noruing) glucose molecules'

-\ur)-ua" from different structural isomers of glucose'

\Oirir" *h"n different carbons of the linear structwe ioin to form the rings'

-- \

rise because the hydroxyl group at the point of ring closure can be trapped in either one of two Possible

positions.

E) lnclude an aldose and a ketose.

10) Fatty acids are

A) components of DNA.

@omposed of carbory hydrogen, glycerol, and a phosphate group'

p)hydrophobic.

ts) composed of four linked rings.

E) composed of carbory hydrogeo and oxygen in a 1:2:1 ratio

7

I Bio202Qtnz 4MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

11u^" .vu.u- - l , / ,_r_ _.

9 /4106

f) |orymers of gqlfsagchaddes, fats, and Prqleineare all synthesized flom monomers by

/ A)ruhe removal of water (dehydration reactions).L'BJ ionic bonding of the monomers.

C) the formation of disulfide bridges between monomers.

D) the addition of water to each monomer.

E) comecting monosaccharides together.

2) Which of the following best sumrnarizes the relationship between dehydration reactions and hydrolysis?

Al$ydrolysis creates monomets, and dehydration reactions destroy them.

f)-Dehydration reactions assemble polymers, and hydrolysis breaks them down.

C) Dehydration reactions occur in Plants, and hydrolysis happens in animals

/ ' '

D) Hydrolysis occurs during the day, and dehydration reactions happen at nigh1, -"E)Dehydration reactions can occur only after hydrolysis.

_-.'

,gr(

3) Consider a polysaccharide consisting of 828 glucose molecules. The total hydrolysis of {he Polysaccharidewould rcsult in the production of

A) 827 water molecules.

/€)-$28 glucose molecules and no water molecules.

C)827 glucose rnolecules and 827 water molecules.

D) 828 glucose molecules and 828 water molecules.

E) 827 glucose molecules.

4) Which of the following is frue ofboth starch and cellulose?/a-

,,.4) They are both polymers of glucose.t E) They are geometric isomers of each other.

C)They are both structural comPonents of the Plant cell wall.

D) They can both be digested by humans. --.-"'E) They are both used for energy stora1e in Plants.

_-.'/

5) What is a fat or triacylglycerol?

A) a kind of lipid that makes up much of the plasma membrane

B) a protein with tertiary structure

C) a carbohydrate with three sugars ,,-^

D)arrrolecule formed from three alcohols ,.,,uu

E) a lioid made of three fattv acids and qlvcerol

-rt6) Carbohydrates normally function in animals as

A)the functional units of lipids.

B)sites oi protein synthesis.

C) a component o{ irigiycerides,

tf, ir.,".g-v-stor"ge molecuies.

E)enzymes in the regulation of metabolic p

8)

Which of the following is frze conceming saturated fatty acids?

A) They are the predominant fatty acid in com oil.

B) They are usually produced by plants.

9Fg{ have double bonds between the carbon atoms of the fatty acids.

I€)_T!ui Lu"" ^

higher ratio of hydrogen to carbon than do unsaturated fatty acids.

E) They are usually liquid at room temPerature.

Th9 hydrogenation of vegetable oil would result in

A) the oii being a solid at room temperature.

B) an hcrease in the number of hydrogen atoms in the oil molecule.

C) a decrease in the number of carbon-carbon double bonds in the oil molecules.',

\wo of the above.

(prll of the above.

9) Which type of lipid is most important in biological membranes?

A) oil

C) polysaccharide.

D) protein.

E) polypeptide.

B) wax C) fat D) trielvceri spholipid

105,000 daltons. From,"

10) A molecule inside a cell consists of over 3,500 covalently linked atoms w€fghing about

thisdcscripiion, the molecule can most sPecifically be described as az'----)

@fmicromolecule.B) lioid.h

-2

Bio202Quiz 4 - Macromolecules 9179 /08MULTIPLE CHOICE. Choose the one altemative that best completes the statement or answers the question,

1) Polymers of polysaccharides, fats, and proteins are all synthesized from monomers byA) connecting monosaccharides together.B) the addition of water to each monomer.

@the removal of water (dehydration reactions).D) ionic bonding of the monomers.E) the formation of disulfide bridges between monomers.

2) Which of the following best summarizes the relationship between dehydration reactions and hydrolysis?

@ Dehydration reactions assemble polymers, and hydiolysis breaks tiem down..B) Hydrolysis occurs during the day, and dehydration reactions happen at night.C) Dehydration reactions can occur only after hydrolysis.D) Hydrolysis creates monomers, and dehydration reactions destroy them.

, E) Dehydration reactions occur in plants, and hydrolysis happens in animals.

Figure 5.13) If 100 molecules of the general type shown in Figure 5.1 were covalently joined together in sequence, the

single molecule that would result would be a

$) PolYsaccharide.B) polypeptide.C) polyunsaturated lipid,D) nucleic acid.E) fatty acid.

4) Ahich of the following is frae of both starch and cellulose?

Q! They are both polymers of glucose.B) They are geornetric isomers of each other.C) They can both be digested by humans.D) They are both used for energy storage in plants.E) They are both structural components of the plant cell wall.

5) What is a fat or triacylglycerol?

A a protein with tertiary structure(!) a lipid made of three fatty acids and glycerolC) a kind of lipid that makes up much of the plasma membraneD) a molecule formed from three alcoholsE) a carbohydrate with three sugars

HHHHHHHHHH ,Tl l l l l l l l l l / / "

H-C-C-C:C-Q-c-Q-c:c*9-c.

l l l i ' l l 'o ,Figure 5.3

6) The molecule shown in Figure 5.3 is aA) polysaccharide.B) polypeptide.C) saturated fatty acid.D) nucleic acid.

(!) unsaturated fatty acid.

7) The 20 different amino acids found in polypeptides exhibit different chemical and physical propertiesbecause of differentA) carboxyl groups.B) amino groups.

@ side chiins iR groups).D) tediary structure.E) Both A and B are correct.

ol' Hfc lz HcH ott- ' t l l l

H-N-9 - 9-t9!_!J-N-c - c-oH| i l -T-- |H O HzO H

Figure 5.5

8) te chemical reactions iilustrated in Figure 5.5 result in the formation ofQ!) peptide bonds.

B) ionic bonds.(C) Slycosidic bonds'D) hydrogen bonds.E) an isotope,

/f/ Wru.n type of interactio.{@fr" g-bgu- structure of proteins?

/ @ny ai"pnobic interactibns/ B) nonpolar covalent bondsX

C) ionic interactions - \) hydrogen bondsE) polar covalent bonds y

aC CHr

J,0) At which level of protein structure are interactions between R groups most important?

/ A) pnmaryB) secondaryOtertiary \D) quatemary

@ fh"y ur" "qually

important at all levels.

' 0n ^y

ho,o,, J ),o"r ne,/le.

\ - 1) Tlre structural level of a protein least affecied by a disruption in

A)primarv level.

^ b(r".o.rauty terrel.

l, C) tertiary level.

\ quaternary level.BI)\ll structural levels are equally affected.

2) Which of the following is nof a protein?A) hemoglobin

-@) choleiterol C) an antibody

4 3) Choose the pair of terms that correctly completes this sentence:

{ 1 Nucleotides are to - as - are to proteins.

@hucleic acids; amino acids' B) amino acids; polypeptides

C) glycosidic linkages; polypeptide linkages

hydrogen bonding is the

@tt) an enzyme E) insulin

D) genes; enzymesE) polymers; polypeptides

4) Which of these is a difference between DNA and RNA?

\RNA is double-stranded; DNA is single-stranded.B) DNA is found in the nucleus; RNA is never found in the nucleus.C) In DNA, adenine pairs with guanine; in RNA. adenine pairs with thymine.

@ DNA contains thymine; RNA contains uracil.E) DNA consists of five different nucleotides; RNA consists of four different nucleotides.

5) The structural feature that allows DNA to replicate itself is theA) su gar-phosphate backbone.

@.o.pt"r"""iury pairing of the bases.d) phosphodiester bonding of the helices.D) twisting of the molecule to form an a-helix.E) three-part structure of the nucleotides.

6) Which of the following are nitrogen bases of the pyrimidine type?A) guanine and glucoseB) cvstine and sucrose

@tirymine and cytosineD) ribose and deoxyriboseE) glycerol and glycogen

7) Which bonds are created during the formation of the primary structure of a protein?

@peptide bondsB) hydrogen bondsC) disulfide bondsD) Only A and C are correct.E) A, B, and C are correct.

8) The tertiary structure of a protein is theA) bonding together of several polypeptide chains by weak bonds.B) order in which amino acids are joined in a peptide chain.C) bonding of two amino acids together to form a dipeptide.N) twisting of a peptide chain into an o-helix.

@ three-dimensional shape obtained by binding of R groups

9) The R group or side chain of the amino acid serine is -CH2-OH. The R group or side chain of the amino

acid alanine is -CH3. Where would you expect to find these amino acids in globular protein in aqueous

solution?A) Serine would be in the interior, and alanine would be on the exterior of the globular protein.

@JXlanine would be in the interior, and serine would be on the exterior of the globular protein.C) Both serine and alanine would be in the interior of the globular protein.D) Both serine and alanine would be on the exterior of the globular protein.E) Both serine and alanine would be in the interior and on the exterior of the globular protein.

10) Which of the following descriptions besi 6ts the class of molecules known as nucleotides?A) a nitrogen base and a phosphate groupB) a nitrogen base and a five-carbon sugar

@ nitroien base, a phosphate group, ind a five-carbon sugarD) a five-carbon sugar and adenine or uracil

i E) a five-carbon sugar and a purine or pyrimidine

"01, r,.,, h:*: ,3 ],]",,*r,,,*," 1,,,,tjtJr# *," )ud',L,d' u, y1,',

4',- \

A) a light microscope.

@ a sc-anning electron mr.rrr.opu.C) a transmission electronic microscope.D) both A and C.E) A, B, and C.

t-Z) Which of the following is rot found in a prokaryotic cell?AIDNAB) cell wall

\) plasma membraneDlribosomes

@ endoplasmic reticulum

X 3) Which of the following is not apart of the endomembrane system?.{'R) mitochondria\_<, ^ ,Ll,) UOlgr aPParatus

C) rough endoplasmic reticulum^\.@)_) lysosomesE) smooth endoplasmic reticulum

-. r4I Which type of organelle is primarily involved in the synthesis of oilg phospholipids, and steroids?

I 4) ribosomes, B) lysosomes

Q smooth endoplasmic reticulumE) mitochondria-Xlcontractile vacuoles

\-5f Which of the following pairs is mismatched?A) nucleolus-ribosomal RNAB) nucleus-DNA replicationAI

Q)lysosome-protein synthesisD) cell membrane-lipid bilayer!E) cytoskeleton-microtubules

X O) O^f thu fotlowing, what do both mitochondria and chloroplasts have in common?, r @ ett is prod-uced.' I B) DNA is present.

. C) Ribosomes are present.N) Only B and C are correct.

,flf)n, g, and C are correct.\_.2

,-.27J In animalcells, hydrolytic enzymes are packaged to prevent general destruction of cellular components.Which of the following organelles functions in this compartmentalization?A) chloroplast

@lyroro-"C) central vacuoleD) peroxisomeE) glyoxysome

X 9) A ceu lacking the ability to make and secrete glycoproteins would most likely be deficient in its

t -4f

Which of the following contain the 9 + 2 arrangement of microtubules?A) cilia B) centrioles C) flagella @ A and C only

\) nuclear DNA.B) extracellular matrix.

@Golgi apparatus.

@B and C only.E) A, B, and C.

'/ f O) Whi.h of the following intercellular iunctions is responsible for anchoring cells to each otherA) tight iunctions

"if) des*osornes C) gap junctions @)bo;h A and B @, B, and C

E) A, B, and C

Bio202Quiz - Tour of the cell

- MULTIPLE CHOICE.

\!-/ 1) What limits the resolving power of a light microscope?A) the type of lens used to magnify the obiect under study

Q) the shortest wavelength of light used to illuminate the specimenC) the type of lens that focuses a beam of electrons through the specimenD) the type of heary metal or dye that is used to stain the specimenE) the ratio of an object's image to its real size

Nu^" k€l l l€ BthQh0Frr9 126108

Choose the one altemative that best completes the statement or answers the question.

J'

When biologists wish to study the topography of cellq they most likely would useA) a light microscope.

@ a scanning electron microscope.C) a transmission electronic microscope.D) both A and C.E) A, B, and C.

Large numbers of ribosomes are present in cells that specialize in producing which of the followingmolecules?

) lipids B) starches @ proteins D) steroids E) glucose

4),,Which of the following is roi a part of the endomembrane system?

!) mitochondriaB) Golgi apparatusC) rough endoplasmic reticulum

@ lyro.o-"r '

E)'smooth endoplasmic reticulum

5) Of the following, which is probably the most common route for membrane flow in the endomembranesystem?A) Golgi * ly5esome - ER - plasma membraneB) tonoplast --- plasma membrane - nuclear envelope - smooth ER

t) nuclear envelope - lysosome * Golgi * plasma membrane

Q) rough ER - vesicles - Golgi -. plasma membraneE) ER * chloroolasts - mitochondrion -- cell membrane

5) Which of the following pairs is mismaiched?A) nucleolus-ribosomal RNAB) nucleus-DNA replication

Q lysosott e-p.otein synthesisD) cell membrane-hpid bilayerE) cytoskeleton-microtubules

O_f the following, what do both mitochondria and chloroplasts have in common? ($) ATP is produced.B) DNA is present.C) Ribosomes are present,D) Only B and C are correct.

f) A, B, and C are correct.

8) Of the following, which cell structure would most likely be visible with a light micoscope that had beenr4anufactured to the maximum resolving power possible?

@ mitochondrionB) microtubuleC) ribosorneD) largest microfilamentE) nuclear pore

9) In animal cells, hydrolytic enzymes are packaged to prevent general destruction of cellular components.Which of the following organelles functions in this compartmentalization?A) chloroplast

@ lytoto-uC) central vacuoleD) peroxisome

7 E) glyoxysome

16) Grana thylakoids, and stroma are all components found in

1 A) cilia and flagella.

/ D chloroplasts./ @ mitochondria.

D) lysosomes.E) nuclei.

I

I

I

I

Quiz 5 -tour of the cell Name ,,{/ [arre Lo trcl-------------J-uEto3

1. one ofthe characteristics that distinguishes a eukaryotic cell from a prokaryotic cellis the PRESENCE OF:

!2. a plasma membrane

@an endoplasmic reticulum

2. One major difference between all animal and plant cells is:a. animal cells have mitochondria; plant cells do not

. b. plant cells have a cell membrane; animal cells do not.(Q all plant cells have chloroplasts; animal cells do not ./-e. . plant cells are prokaryotic; animal cells are eukaryotic

3. Which organelle is CORRECTLY matched with its function?ORGANELLE.- FUNCTION

a. ribosomesy acell wall

4. Which one of these structure will be visible with a lishtb. DNAd. ribosome

/ lysosme - protein syntiesis and modification!. nucleus -- polysaccharide synthesis4! ribosome - synthesizes ATP and sugars(f Colgi complex - protein modification and targeting

ji eolgi complex(9) Nucleus

mrcroscope

5. In Eukaryotes, lipids are synthesized in the:

@smoothER @roughERc. plasma membrane I mitochondrion.

6. What is the function of Nucleolus

t

rJ sq,n' i l {srt t5 y {bo5ow\ls

7. If all ribosomes were destroyed wha! activity will be most effected?a. DNA replication (t,Frotein synthesisc. Lipid metaboliim @toxic removal

X8. what is the differeDce between tansmission and scanning electron microscope

Jy46i,nri l1 iorr 9rv{5 a dvr{11t!.d piaf lr , . Cr J\u t f l l rd_[

bu+ '1r,{ s(tff}nint t,ve i -ti,e tup{' "1,:vrq ffi9. All the following are a part of the endomembrane system excepr

,d nucleus bi smooth ERg. tmnsport vesicle @ lysosomes

a/I 0. What is the function of nuclear pores?

lc oilov! pct:1,ail i 0{ rran'l{v iai: l i ' arn(l ovil 0{ tVr-(,

C\ LT,L\n{ul

dL

nu( l"{ \.,15

Biolog5r 202Quiz # 5

,,r{I:

l. State one major difference between a procaryotic and an eucaryotic cell

? ro car,l o*ru a)\s laa,tt- ne *v"l"an '*^et^W"* or slvucl"''ve)

(,rLatjal,c ed\ s h'r'p r dwu'c!"lvly'. ntt'n'le'^s vtr!'a a' 4'n'l3o'

Aucl a-v$ ,

,*e^nbr

2. State one major difference between a plant and an animal cell

P[a& cells ha*vc a- cct( aall n)acr ca's antnao'1 *11t Ao nol ,

lu.\U

_/ //-

3 . Smootb/Rough < nnoa-H^ nn is responsible for the detoxificatio "

p'ryt{'

--at ---

4. Name two organelles that have double membranes

4olq'r appa,ra*nsv v t r

6. State the function of lysosomes - 'b covnlte 'la'g{e a" d ho rvurFal

Qr* 94 ael\,

7, The scanning electron tnicroscope gives detailed images of the

J J -'tr . - -./ 'E< . . ' '

5. Th-e conventional ligbi'microscope can giye.{etailed images of structures gpras"' ;i-Dlil-.-----Snotein'

-@ucteus d)lvsgsdmes

a) iatericr of the cell7fD surface regons of a cell'Ef protein strucutres

d) DNA structues

'8.EnzymesthattransferHydlogenfromvarioussubstratjestooxygenareforrndinthe,;r\Lysosomes- (bDeroxi somes

SMitochondriad) ChloroPlasts

9.The contains DNA that codes fora) nucleushL nucleoidfc)/ nucleolusVJ nucleoPlasm

10. The bacteria and eucaryotic cells make proteins using.very simiiar enrymes and.

.if!.iil#. Uiidthdirf"i-"d; you can ioncluAe that-bot6 bacteria and eucarvotic cellshave

a) Nuclear membraneb) Mitochondria

@ Ribosomesd) Peloxisomes

ribosomal RNA

---'

-t''

:

Biology 202Quiz # 5

l. State one major difference between a procaryotic and an eucaryotic cellQ.^t""r1"llc t.ll5 \..,,.-t a rr,rr b,",.,r \,:,.. j ...,olr* t

2. State one major difference between a plant and an animal cell

Pi ^c

[&u\ hu...r cLlt \ql\l c,... v\ trri !-u \ cr i i l

It

J ' 3. Smooth/Rough *ru.o ,t'l,r ER is responsible for the detoxification,N-

\ t . l l

\( \l 4. Name two organelles that have double membranes.r.i\ r,\^ 0", d,r i 6. \ ^". <-r

t0).'

i0

5. Theconventional Iight microscope can giqderailed imagesa) DNA b) Protein - -

@.{ucleus

of strucoreyfuch as$fsosomes

6. State the function of lysosomes

\ o\iy.t t ru.1,'-.,, r^pr.e c,,urvr4

t, * r.,nliTg elechon microscope gives detailed images of thea, rntenor oI the ceu@ surface regions of a cellc) protem strucuE€sd) DNA stuctures

8, !'nzymes that nansfer Hydrogen from various substrates to oxygen are found in thea) Lysosomest6P6roxisomesc) Mitochondriad) Chloroplasts

9. The pontains DNA that codes for ribosomal RNAa) nucleusb) nucleoid@)) nucleolus@ nucleoplasm

10. The bacteria and eucaryotic cells makemolecules. Using this infoirnation you cannave

a) Nuclear membrraneb) Mtochondria@ Ribosomesd) Peroxisomes

f t D vu, i.. c,1

proteins using very sconclude that both!

Bio202Quiz 5MULTIPLE CHOICE.

of differentF\

@fide chains (R grouPs).

B) carboxyl grouPs.

C) amino groups.

D) tertiary structue.

E) Both A and B are correct.

A) nonpolar covalent bonds

B) ionic interactions

(!)hYdrogen bonds

D)polar covalent bonds

E) hydrophobic interactions

. 2128/05 oChoose the one altemative that best comPletes the stalement or answers the question.

1) The 20 different amino acids found in polypeptides exhibit different chemical and physical properties because

2) Kch

bonds are created during the formation of the primary structure

Q!ftePtide bonds ,/B)hydrogen bonds

/,/C) disulfide bonds

-/D) Only A and C are correct'

E) A, B, and C are correct.

3) Whic-h type of interaction stabilizes the c-helix structure of Proteins?

of a protein?

4) At which level of protein structure are interactions between R grouPs most imPoltant?

A) tertiary

(grluaternaryC) secondary

3]PrimaryE) They are equally imPortant at all levels.

,/

\

5) The R group or side chain of the amino acid sedne is -CH2-OH. The R group or side chain of the amino acid

alanine is -CHr. Where would you expect to find these amino acids in globular protein in aqueous solution?

A) Alanine would be in the interior, and serine would be on the extedor of the globular protein.

B) Both serine and alanine would be in the interior and on the exterior of the globular protein.

C)Both serine and alanine would be on the exterior of the globular protein.

6) Which of the following besf describes the relationship between proteins, RNA" DNA, and genes in humans?

7) Which of the following descriPtions best fits the class of molecules known as nucleotides?

A) genes "+ RNA "'' DNA --t Proteins

filbro,"i* "- RNA "'' DNA "'+ genes

e) RNA "- DNA "- genes "'' proteins

D) DNA + genes "'+ RNA -t ProteirsE) genes - proteins - RNA - DNA

A) a five-carbon sugar and adenine or uracil

B) a nitrogen base and a phosphate group

.!\ nitrogen base and a five-carbon sugar

(D)y' nitrogen base a phosphate group, and a five-carbon sugar

!a five-carbon sugar and a purine or pyrimidine

polch of the following are nitrogen bases of the pyrimidine type?

tyhymine and cytosine

\x/ '

8)

9) A:equence of a DNA polymer consisting of 80 purines and 80 pyrimidines could have

/AibO "r".it

ana 80 adenine molecules.

E-) 160 cytosine and 160 thymine molecules. \C)80 adenine and 80 guanine molecules { ,- \

,@

E) both B and C.

10) The difference between the sugar in DNA and the sugar in RNA is that the sugar in DNA

B) guanine and glucose

C) cystine and sucrose

D) glycerol and glycogen

E) ribose and deoxyribose

B) can attacrh to a Phosphate, unlike the sugar in RNA.

C) can form a double-stranded molecule.

D) has a six-membered ring of carbon and nitrogen atoms.

6is a six-carbon sugar and the sugar in RNA is a five-carbon sugar.\-/

- - \

BiomzQuiz 5MULTIPLE CHOICE.

C ".

nn^t l.y1r,sr, a V^a--

Choose the one altemative that best completes the statement or answers the question.

1) The 20 different amino acids found in polypeptides exhibit different chemical and physical properties because

oPiffercnt

€D[de chains (R grouPs).

b,lcarboxyl grouPs.

C) amino groups.

D) tertiary structure.

E) Both A and B are correct.

2) Which bonds are created during the formation of the Primary structure of a Protein?

@ntidebondsB) hydrogen bonds

C) disulfide bonds

D) Only A and C are correct.

E) A, B, and C are correct'

3) Which type of interaction stabilizes the c-helix structure of proteins?

Nu-e-D\-KYB-e/l-2t28 t0s ^<in(

g4v?f, rr+r fPl+r!.d

**!;;3;"",,.". N rr*

A) nonpolar covalent bonds

B) ionic interactions

@yd.og"n bo.ta,

d-)-polar covalent bonds

E) hydrophobic interactions

4) ,finhich level of Protein structure are interactions between R grouPs most imPortant?

', ilt"rti- -.-\Bfquatemary ,r'

C) secondary

D) primary

E) They are equally imPortant at all levels.

5) The R group or side chain of the amino acid serine is -CH2-OH. The R group or side chain of the amino acid

alanine is -CHa. Where would you expect to find these amino acids in globular Protein in aqueous solution?

(ibAlur,ine *o,rld be. in the intedor, and serine would be on the exterior of the globular protein.

YBoth serine "r,d

alanine would be in the interior and on the extelior of the globular protein.

D) Serine would be in the interior, and alanine would be on the extg;iofof the globular protein'

E)Both serine and alanine would be in the interior of the glob;rfr protein.

{

6) Which of the following &est describes the relationship between proteins, RNA, DNA, and Senes in humans?

A) gmes "'+ RNA -'' DNA -t ProteinsB) proteins -+ RNA "'+ DNA "'' genes

C) RNA --'t DNA "'' genes "'+ Proteins

(D*^"- genes + RNA * ProteinsYf genes - proteins - RNA - DNA

7) Which of the following descriptions besl fits the class of molecules known as nucleotides?

A) a five-carbon sugar and adenine or uracil

B) a nitrogen base and a PhosPhate grouP

C) a nitrogen base and a five-carbon sugar

(l.!.\itrogm uase, a phosplate group, and a five-carbon sugar

E) a five-carbon sugar and a purine or pyrimidine

8) Which of the following are nitrogen bases of the pyrimidine type?

(Ihhymine and cytosine

B) guanine and glucose

C) cystinet and sucrose

D) glycerol and glYcogm

E) ribose and deoxYribose

9) A sequence of a DNA polymer consisting of 80 purines and 80 pyrimidhes could have

A) 80 uracil and 80 adenine molecules.

B) 160 cytosine and 160 thymine molecules.

,-C\80 adenine and 80 guanine rnolecules'

(g)80 adenine and 80 thymine molecules.

E) both B and C.

10) The difference between the sugar in DNA and the sugar in RNA is that the sugar in DNA

,/

D) has a six-mernbered ring of carbon and nitrogen atoms.

E) is a six-carbon sugar and the sugar in RNA is a five-carbon sugar.

,/

/ A) |ontains less oxYgen.It-1s$ can attach to a phosphate, unlike the sugar in RNA.

C) can form a double-stranded molecule'

-Biolog;r 202Quiz # 5

l. State one major difference betrveeq a proc

-Tho n)r.\lz-orf qofic cet \ P,l}{-s ntte one major difference betwee4 a procaryotic and an eucaryotic cell

-Tho-yorzrrrrlohccetl Clru nOl h(LA frpnbreutt Voytd arryruJla-Sl r

l;wa 4Yro t-ucct'yoh L 9L+f ., wa'

2. State one major difference betrryeei a plant and an animal cell

, , - - - - - - . ' .3.($9qb)Rough - ER is responsible for the detoxi

a) DNA b) hotein

6. State the function of

prolein strucutresDNA structurcs

otr prooess

ges of strughxcs such aslysosomes

- \

r\'3-V

are found in the

7-,_?-

lo"tv,o \

lYsosomes

rte) S\o.e- 5uk+ont€$ KThe scanningrele clron microscope gives detailed images of theinterior of the cell )

x- \

8. Enzymes that transfer Hydrogen from various

9. The contains DNA that codes for ribosomal RNA

c)d)

a) nucleusb),-nueleei(-

c-cl nu*olys\o) nucleopr:rsm

substrates to oxygen

-"

proteins using very similar enrymes andconclude that both bagleria and eucaryotic cells

10. The bacteria and eucaryotic cells makemolecules. Using this infomtation you canhave

a) Nuclear membraneb) Mtochondria

d) Chloroplasts

d) Peroxisomes

'Cr', onv j6''to{' 3 ,J*';f,o ::;;Yt-/ r| vltYgor *'tc

c6'; ,g4 I 76p on */t'r ,'fBio202-. !)-er /vtt;? , .d p n.Z);' ' Nu ".A-VY,,- -24;/o-r' 'Bio 202 J'"- rz t tiz , .t/ p /3./ ..+ Name__2'\rUV;aar__2' -_!r/{

(Quiz - Pfasma membran-e \'"( Zt*,," -).

///,r'/r- tl13lo9MULTIPLE CHOICE. Choose the one alt6rriative thii 64t-diifr-pletes the statement or answers the question.

-.,-{) Xl of th. following molecules are part of the cell membr ane exceptA) lipid.6) nucleic acids.\<Li prorern.D) phosphate group.E) steroid.

._..-?).The presence of cholesterol in the plasma membranes of some animals

62 1$)enables the membrane to stay fluid more easily when cell temperature drops.B) enables the animal to remove hydrogen atoms from saturated phospholipids.

, C) enables the animal to add hydrogen atoms to unsaturated phospholipids.D) makes the membrane less flexible, so it can sustain greater pressure from within the cell.E) makes the animal more susceptible to circulatory disorders.

--3|'What are the elevated regions (particles) seen in electron micrographs of split freeze-fracturedmembranes?A) peripheral proteinsB) phospholipidsC) carbohvdrates

D)integri proteins-E ) cholesteiol molecules

-2 All of the following are functions of integral membrane proteins ercept

@)enzyme synthesis.B) active transport.C) hormone reception.D) cell adhesion.E) cytoskeleton attachment.

.---,.5f The kinds of molecules that pass through a cell membrane most easily are,\f large and hydrophobic.

(!) small and hydrophobic.C) large polar molecules.D) ionic.E) monosaccharides such as glucose.

;Il-7iII of the following cellular activities require ATP energy excEt( ) Q!)novement of 02 into the cell.

,- B) proton pump

C) Na+ ions moving out of the cell.D) pinocytosisE) endorytosis

77l3l0e

,-,tr A patient has had a serious accident and lost a lot of blood. In an attempt to replenish body fluids, a largeamount of distilled water was transferred directly into one of his veins. What will be the most probableresult of this transfusion?A) It will have no unfavorable effect as long as the water is free of viruses and bacteria. ''r-',B) It will have serious, perhaps fatal, consequences because there will be too much fluid for the head to

PUInP.C) It will have serious, perhaps fatal, consequences because the red blood cells will be hypotonic relative tc

the body fluids and the cells will shrivel.

@ It *ill hurr" s"rious, perhaps fatal, consequences because the red blood cells will be hypertonic relativeto the body fluids and the cells will burst.

E) It will have no serious effect because the kidneys would quickly eliminate the excess water.

-.*Yfuhich oI the following would indicate that facilitated diffusion was taking place?

A) Substances were moving against the diffusion gradient.

@A substance was diffusing much faster than the physical condition indicated it should.C) ATP was being rapidly consumed as the substance moved.D) A substance was slowing as it moved down its concentration gradient.E) A substance was moving from a region of low concentration into a region of higher concentration.

..-.-9'f,lhar is the voltage across cell membranes called?A) water potentialB) chemical sradient

@nembran-e potentialD) osmotic potentialE) electrochemical gradient

*;l0)--Vvhite blood cells engulf bacteria through what process?A-l exocytosis

P,)bhagocytosisC) pinocytosisD) osmosisE) receptor-mediated exocytosis

N^^" /-a1gra Cq2k

Quiz - Plasma Membrane 3114/05

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

1) The presence of cholesterol in the plasma membranes of some animals

A) makes the membrane less flexible, so it can sustain SIeateI Plessure from within the cell.

3) Whai is one of the ways that the membranes of winter wheat are able to remain fluid when it is extremely

FF?[)Uy in.."uri.,g the percentage of cholesterol molecules in the membran"

^ n, a

&(;;;;;;;;; tt'" i",.*tug" or unsaturated Phospholipids in the membrane {

' U )

\ty decreasing the number of hydrophobic proteins in the membrane

D)AandB

E) A, B, and C

4) All of the following are functions of integlal membrane Proteins ercep'

A) hormone recePtion.

@nzyme synthesis.

C) cytoskeleton attachment.

D) active transPort.

E) cell adhesion.

5) The kinds o{ molecules that Pass through a cell membrane most easily are

A) ionic.

B) large and hYdroPhobic.

According to the fluid mosaic model of cell membranes, which of the following is a t7 € statement about

membrane phosPholiPids?

A) They frequently flip-flop from one side of the membrane to the other'

B) They occur in an uninterrupted bilayer, with membrane Proteins lestlicted to the surfacyrf the membrane'

C) They are {ree to depart from the membrane and dissolve in the surrounding solutio

fl enables the animal to remove hydrogen atoms from saturated phospholipids'

fOenables the membrane to stay fluid more easily when cell temperature drops'

Xmakes the animal more suscePtible to circulatory disorders'

f, enables the animal to add hydrogen atoms to unsaturated PhosPholiPids'

flThey have hydrophilic tails in ihe interior of the membrane'

/ufrh"y .* rnot e laterally along the plane of the membrane'

Q) monosaccharides such as glucose.

plmall and hYdroPhobic.

E) large polar molecules.

6) A patient has had a serious accident and lost a lot of blood. In an attempt to replenishlody fluid' a large

amount of distilled water was transferred directly into one of his veins. What will be the most probable result

of this transfusion?

fiI, -ill

hu.rr" ""rious,

perhaps fatal, consequences because the red blood cells will be hypertonic relative to

V the body fluids and the cells will burst'

B) Ii will have serious, perhaps fatal, consequences because there will be too much fluid for the heart to pump'

C)Itwillhavenoseriouseffectbecausethekidneyswouldquicklyeliminatetheexcesswater

D) It will have no unlavorable effect as long as the water is free of viruses and bacteda.

E) It will have serious, PerhaPs fatal, consequences because the red blood cells

the body fluids and the cells will shrivel'

7) Celery stalks that are immersed in fresh water {or several hours become stiff and hard' Sirnilar sialks left in a

salt solution become limp and soft. From this we can deduce that the cells of the celery stalks are

@hypertonic to fresh water but hypotonic to the salt solution'

{Lisotonic with fresh water but hypotonic to the salt solution'

(1hyp".tot i" to both fresh water and the salt solution'

$hypotonic to both fresh water and the salt solution'

E) hypotonic to fresh water bui hypertonic to the salt solution

8) Wlfth of the following would indicate that facilitated diffusion was taking Pface?

6l lruashtrT" *as tliftusing much fasrer than the physical condition indicated it should.

t-) A substance was slowing as it moved down its concentration Sradient'

@{ ,,rb"tu.,"" ,"as moving from a region of low concentration into a region of higher concentration.

D) Substances were movmg against the diffusion gradient' , \E) ATP was being rapidly consumed as the substance moved'

A- - \

9) What is the voltage across cell mernbranes called?

A) water potential

B) chemical gradient

@smotic potential

p{ectrochemical gradient

./'E) y)embrane Potential

10) Which of the following characterizesthe sodium-Potassium PumP?

A ;IlO carrier protein undergoes conformational change'

r' \ 9)X, A, and C

b BPotassium ions are pumped into a cell against their gradient''€

E)A and B

Z @ Sodium ions are pumped out of a cell against their Sradient'

81o202Quiz - Plasma membrane 9 /2e 106MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

1) )g.nresgnce

of cholesterol in ihe plasma membranes of some animals

/rA)er-rables the membrane to stay fluid more easily when cell temperature drops.\- !,-

B.\-'nables the animal to add hydrogen atoms to unsaturated phospholipids.

Cleiables the animal to remove hydrogen atoms from saturated phospholipids.

D) makes the animal more susceptible to circulatory disorders.

E) makes the membrane less flexible, so it can sustain gr eate:ptefFi.we frornwithin the cell.

.,.2) What are the elevated regions (particles) seen in electrd-n micrographs of split freeze-fractured membranes?

A) peripheral proteins

B) phospholipids

1$Rtegral protetns

D) cholesterol molecules

E) carbohydrates

\J/

B) cell-cell recognition.

piiryLal transduction.

/Dlploten synthesis.

'- E) intercellular joining.

4) The kinds of molecules that pass through a cell membrane most easily are

lv

3) A11 of the following are functions of membrane proteins except

A) transDort.

A) monosaccharides such as glucose.

B) ionic.1-'--\,,

/,L) 2qta ano nyoroPnoorc.I -D) large polar molecules.

E) large and hydrophobic.

of the following cellular activities require ATP energy excepf

Movement of K+ ions into the cell

of 02 into the cell.

proton pump

D) Na+ ions moving out of the cell.

E) endocytosis

6) What is the voltage across cell membranes called?

A) water potential

//D.i erecrrocnemrcal gradtentLd!..-t"."..

-^+.-r;"t\7'*, ' '- '- '*t ) \ ^^-^r : ^ -^r^- ! : ^r

F) rhpm ical ot : r t icn+

Ir

:a

7) A patient has had a serious accident and lost a lot of blood. In an attempt to replenish body fluids, a largeamount of distilled water was transfered directly into one of his veins. Vvhat will be the most probable resultof this transfusion?

A)It will have no serious effect because the kidneys would quickly eliminate the excess rvater.

. B) It will have serious, perhaps fatal, consequences because there will be too much fluid for the heart to pump.'gYIo.giU huuu r,o unfavorable e{fect as long as the water is free of viruses and bacteria.

"D) It will have serious, perhaps fatal, consequences because the red blood cells will be hypertonic relative to,., rJ) lL wur rr4vE DYlruuD, yelrtdPD rdrdr/ rurrD

:-.. .' the body fluids and the cells will burst.

E) it will have sedous, perhaps fatal, consequences because the red bl 6ells will be hvpotonic relative tothe body fluids and the cells will shrivel.

8) The movement of a substance across a biological membrane against its concentration gradieni with the help of

)]9@ input is whlch of the following?

1.,,'A).a(tiu " tt untp ott

B) exocytosis

C) osmosis

Difacilitated diffusion

9) Glucose diffuses slowly through artificial phospholipid bilayers. The cells lining the small intestine, however,rapidly move large quaniities of glucose from the glucose-rich food into their glucose-poor cytoplasm. Using

10) Water passes quickly tluough cell membranes because

A) water movement is tied to ATP hydrolysis.

B) ihe bilayer is hydrophilic.

C) it is a small, polar, charged molecule.

D) it moves through hydrophobic channels.

oves through aquaporins in the my.bfane.

t

Name101 8l0e

MULTIPLE CHOICE. Choose the one altemative that best completes the statement or answers the question,

Bio202

Quiz - Plasma membrane

A) steroid.@ nucleic acids.ti phosphate group.D) lipid.E) protein.

2) What are the elevated regions (particles) seen in electron micrographs of split freeze-fracturedmembranes?

Q!) integral proteinsB) cholesterol moleculesC) phospholipidsD) peripheral proteinsE) carbohydrates

3) A1l of the following are functions of integral membrane proteir.s except

@ enryme syntheiis.B) cytoskeleton attachment.C) cell adhesion.D) active transport.E) hormone reception.

4) One of the functions of cholesterol in animal cell membranes is toA \ cr^ra anarov

B) phosphorylate ADP.C) soeed diffusion.

Q) maintain membrane fluidity.E) facilitate transport of ions.

5) Which of the following would likely move

A) an amino acid B) K+

6) A patient has had a serious accident and lost a lot of blood. In an attempt to replenish body fluids, a largeamount of distilled water was transferred directly into one of his veins. What will be the most probableresult of this transfusion?A) It will have no unfavorable effect as long as the water is free of viruses and bacteda.B) It will have no serious effect because the kidneys would quickly eliminate the excess water.C) It will have serious, perhaps fatal, consequences because the red blood cells wi.ll be hypotonic relative I

the bodv fluids and the cells will shrivel.A'p)It will have serious, perhaps fatal, consequences because the red blood cells will be hypertonic relative

to the bodv fluids and the cells will burst.E) It will have serious, perhaps fatal, consequences because there will be too much fluid for the heart to

pump.

through the lipid bilayer of a plasma membrane most rapidly?

@ coz D) starch E) glucose

7) V[hich of the following would indicaie that facilitated diffusion was taking place?' / t

@ A substance was diffusing much faster than the physical condition indicated it should.

B) ATP was being rapidly consumed as the substance moved.C) A substance was slowing as it moved down its concentration Sradient.D) Substances were moving against the diffusion gradient.E) A substance was moving from a region of low concentration into a region of higher concentration.

8) What is the voltage across cell membranes called?A) electrochemical gradient

,<*

$) membrane potentialC) chemical gradientD) osmotic potentialE) water potential

9) Water passes quickly through cell membranes becauseA) it moves through hydrophobic channels.B) the bilayer is hydrophilic.C) water movement is tied to ATP hydrolysis'D) it is a small, polar, charged molecule.

@ it -ou",

through aquaforins in the membrane.

10) White blood cells engulf bacteria through what process?

4) pinocYtosisX!) receptor-mediated exocytosis

(€i phaeocvtosisVl

"*oiut".ir t

E) osmosis X

7

Bio202Quiz - Plasma membrane

r \ . -Name@

319 /07MULTIPLE CHOICE. Choos€ the one altemative that best completes the statement or ansrt he question.

1) All of the following molecules are part of the cell membrane except

@nucleic acids.

B) steroid.

C) phosphate group.

D) protein.

E) lipid.

2) What is one of the ways that the membranes of winter wheat are able to remain fluid when it is extremelycold?

s.n b.^."r^ [ 2.,,( *.tf"1 ".^&A) by increasing the percentage of ehelcal*al rnoleculeslin the membrane

,p\by decreasing the number of hydrophobic proteins in the membrane

p)by increasing the percentage of unsaturated phospholipids in the membrane

D)AandB

E) A, B, and C

3) What are the elevated regions (particles) seen in electron micrographs of split freeze-ftactured membranes?

A) phospholipids

B) carbohvdrates

gintegral proteins

D) cholesterol molecules

E) peripheral proteins

4) AI of the following are functions of integral membrane proteins ercept

A) active transport.

B)hormone reception.

q1 S cetl adhesion.

^

D) cytoskeleton attachment.

' 'd\"-u-" ,vnthesis.\-/

5) The kinds of molecules that pass through a cell membrane most easily are

A) monosaccharides such as glucose.

B) large polar molecules.

C) ionic.

(p) small and hydrophobic.

E) large and hydrophobic,

6) Which of the foilowing statements is correcf about diffusion?

It is a passive process in which molecules move from a region of higher concentration to a region of lower

concentration,

B) It requtes integral proteins in the cell membrane.

C) It requires an exPenditure of energy by the cell.

D) It is very rapid over long distances.

E) It is an active proceds in which molecules move frorn a region of lower concentration to one of higher

concentration.

- Z) A cell with an intemal concentration of 0.02 molar glucose is placed in a test tube containing 0.02 molar

glucose solution. Assurning that glucose is not actively transported into the cell, which of the following terms

describes the internal concentration of the cell relative to its environment?//-:\.\srrsororuc

B) hypertonic

C) flaccid

Dlhypotonic

E) A or B, depending on the temPeratue

- 8) Which of the following would indicate that facilitated diffusion was taking Place?

A) Substances were moving against the diffusion gradient'

@A substance was slowing as it moved down its concentration Sradient'

-€);!TP was being rapidly consumed as the substance moved'- D) A substance was moving from a region of low concentration into a region of higher concentration.

YB-A substance was diffusing much faster than the physical condition indicated it should.

9) Water passes quickly through cell membranes because

.tA) it moves through hydrophobic charmels.

B)water movement is tied to ATP hydrolysis'

C) it is a srnall, polar, charged molecule.

D) the bilaYer is hYdroPhilic.

@t moves through aquaporins in the membrane'

For the fottowing questions, match the membrane model or description with the scientistb) who proPosed the model Each choice may be

used. once, more than once, or not it all,

A. H. Daason and I DanielliB. I. LangmuirC. C. OuertonD. S. Singer and G' NicolsonE. E. Gorter and F. Grendel

10) Membranes are a phospholipid bilayer between two layers of globular Protein'

P\

NameI 125 108

Choose the one alternative that best completes the statement or answers the question.

1) !(hich four elements make up approximately 96% of living matter?(!l carbon, hydrogen, nitrogen, oxygen

B) carbon, sulfur, phosphorus, hydrogenC) oxygen, hydrogen, calcium, sodiumD) carbon, sodium, chlorine, magnesiumE) carbon, oxygen, sulfur, calcium !

2) flre mass number of an element can be easily approximated by adding together the number oI($) protons and neutrons.B) electron orbitals in each energy level.C) protons and electrons.D) neutrons and electrons.E) isotopes of the atom.

3) Oxygen has an atomic number of 8. Therefore, it must haveA) 8 protons.B) 8 electrons.C) 16 neutrons.

ri

Q) Only A and B are correct.E) A, B, and C are correct.

4) How do isotopes differ from each other?A) number of protonsB) number of electrons

A- Ern,rmDer oI neutrons

D) valence electron distributionE) ability to form ions

Bio202Quizl-Chapter2MULTIPLE CHOICE.

ry1

5) Electrons exist only at fixed levels of potential energy. However, if un uto-llEir-LJFufficient energy, apoqsible result is that

Q!/an electron may move to an electron shell farther out from the nucleus.B) the atom may become a radioactive isotope.X

aAl

Q) an electron may move to an electron shell closer to the nucleus.D) the atom would become a positively charged ion.XE) the atom would becorne a negatively charged ion. /

6) Each element is unique and different from other elements because of itsA) atomic weight.

6 atomic nuriber.\JL I mass number.Dj Only e and n are correct.E) A, B, and C are correct.

7) Atoms whose outer electron shells contain eight electrons tend toA) form ionic bonds in aqueous solutions.B) form covalent bonds in aqueous solutions.

(6 be stable and nonreactive.Y) be .rnstable and verv reactive.

E) be biologically important because they are present in organic molecules.

l

- l

8) A covalent chemical bond is one in whichA) electrons are removed from one atom and transferred to another atom so that the two atoms become

oppositely charged.

!) protons or neutrons are shareil by two atoms so as to satisfy the requirements of both.

t$ outer-shell electrons are shared by two atoms so as to satisfactorily fill the outer electron shells of both.D) outer-shell electrons of one atom are transferred to the inner electron shells of another atom.E) the inner-shell electrons of one atom are transferred to the outer shell of another atom.

9) The ionic bond of sodium cNoride is formed when

@) chlorine gains an electron from sodium.B) sodium and chlorine share an electron pair.C) sodium and chlorine both lose electrons from their outer valence shells.D) sodium gains an electron from chlorine.E) cNorine gains a proton from sodium.

10) Which of the following is nof considered to be a weak molecular interaction?-4.(!)covalent bondB) van der Waals interactionsC) ionic bond in the presence o{ water 1D) hydrogen bondE) Both A and B are correct.

/ '

1) Which of the following i9 a trace element thaliaessential to humans?

f.tlnitrogen -.d)

phosphorous 1*c) bai"" ..y') curbon / E) oxygen

2) Each element is unique and different from other elements because of its

{ atomic weight.-)($!tomic number.

p mass number{l.lOnly A and B are correct.E) A, B, and C are correct.

,t'J tt/

3) Oxygen has an atomic number of 8. Therefore, it must have, )n I protons., f 8 electrons.

C) 1.6 neutrons.

Ao"ty e and B are correct.

7E) b,B, and C are correct . l-

4) Which of the following best describes the relationship between the atoms described below?Atom 1

" 'P15

Atom 23'P15

A) They are both radioactive.p/They are both phosphorous cations.

9|They are both phosphorous antons.(o)/hey are both isotopes of phosphorous.

ffhey contain 31 and 32 protons respectively.

_ 5) The reactive properties or chemical behavior of an atom depend on the number of' / A) valence shells rn the atom.

{ P orbitals found in the atom.

, ;G{€lectrons in each orbital in the atom.{ D)blectrons in the outer valence shell in the atom.

\F/rybridized orbitals in ihe atom.

6) Atoms whose outer electron shells contain eight electrons tend toA,JT orm ionic bonds in aqueous solutions.

flform covalent bonds in aqueous solutions.

rC)ie stable and nonreactlve.bfbe unstable and very reactive.

f,) be biologically important because they are present in organic molecules.

7) When two atoms are equally electronegative, they will interact to formA) equal numbers of isotopes.B) ions.

Q Polar covalent bonds/D) non polar covalent bonds.v^,

I, I ronlc Donos.

//a C.l8) The ionic bond of sodium chloride is formed whenr \ -_

@) chlorine gains an electron from sodium.

,9Fsodium and chlorine share an electron pair.

..ftodium and chlorine both lose electrons from their outer valence shells.'(D))odium gains an electron from chlorine.

pchlorine gains a proton from sodium.

9) W\ich of the following is nof considered to be a weak molecular interaction?(A)fovalent bond

! van der Waals interactions

!;/ ionic bond in the presence of waterpI hydrogen bondBf Both A and B are correct

10) If atom 6x(atomic number 5) were allowed to react with hydrogen,;{e molecule formed would be

1)x-H B)H-X-H c)H-x-H U i

E)H=X=H

H H-X-HI

H

+Lo,,T'

/ d\ \

\ \e)+Lo

l ' l r r tq5A.5

ir;;MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

1) Which of the following is a trace element thatliqessential to humans?A) nitrogen B) phosphorous (S;loaine D) carbon E) oxygen

2) Each element is unique and different from other elements because of its

Bio202Quiz 1 - Chemistry

A) atomic weieht.(p),htomic number.

C) mass number.D) Only A and B are correctE) A, B, and C are correct.

3) Oxygen has an atomic number of 8. Therefore, it must have' A) 8 protons.

B) 8 electrons.C) 15 neutrons.-A

@nly A and B are correct.E) A, B, and C are correct.

4) Which of the following best describes the relationship between the aioms described below?Atom 1 Atom 2

,tP 32P

(9

A) They are both radioactive.B) They are both phosphorous cations.

Q) They are both phosphorous anions.

@h"!, are both isotopes of phosphorous''E) They contain 31 and 32 protons respectively.

5) The reactive properties or chemical behavior of an atom depend on the number ofA) valence shells in the atom.B) orbitals found in the atom.

!) electrons in each orbital in the atom. -.-(@ electrons in the outer valence sheltin the atom. t,rz-\<, . . .

T) hybridized orbitals in the atom.

6) Atoms whose outer electron shells contain eight electrons tend toA) form ionic bonds in aqueous solutions.B-) form covalent bgnds in aqueous solutions.

(oJbe stable and nonreactive.)fl be unstable and very reactive.

E) be biologically important because they are present in organic molecules.

7) When two atoms are equally electronegative, they will interact to formA) equal numbers of isotopes.B) ions.

7$Polar covalent bonds. ,-,(p/nonpolar covalent bonds. g /

E) ionic bonds.

8) \e ionic bond of sodium chloride is formed when

Ql)chlorine gains an electron from sodium.B) sodium and chlorine share an electron pair.

?6,^ I\ l

\

i i '6 i /

'-\, .-

7

z-

c'. II

e) sodium and chlorine both lose electrons from their outer valence shells.D) sodium gains an electron from chlorine.E) chlorine gains a proton from sodium.

9) /$ich of the following is 4of-considered to be a weak molecular interaction?

I4lcpvalent bond r,-- '

fiuun der Waals interactionst Clionic bond in the presence of water

.E) hvdroeen bondtElvoth i unaB are correct.

G\t

\J

-...=. { ,--

10) If atom 6x(atomic number 5) were allowed to react with hydroteg.;fq molecule formed would beA)X-H B) H-X-H C) H-X-H /zfr\ I q E) H=X=H

I \sz 'iH FI=X-+I

rlH

' t , '_. . ! ' '\-

="'# *un" .r/ln.^- l,;"2-lBio202- _ _ ------------_ -T-Quiz 1- Chemi!4l context oilife 7127105 UMULTI?LE CHOICE. Choose the one alternaHve that bc6t completee th€ statem€ht or answers the question.

1) Which of the following is a trace element thai is €ssential to humans and other living organisms?

A) nitrogen B) hydrogen C) orygen

2) Each elemmt is unique and diI{erent from other elements because of its

A) atomic weight.

/@tomicnumber.C) mass number.

D) Only A and B are correct.,E) A, B, and C are correct.

3) Orygen has an atomic number of 8. Therefore, lt must have

- A) 8 protons.

- B) 8 electrong.C) 16 neutrons.

qp'bnly A and n are correct.

E) A, B, and C are correct.

4) The atomic number of neon is 10. Therefore, it

A) has 8 electrons in the outer electron shell./=\e)rs inert.C) has an atomic mass of 10.

D) Only A and B are mnect'

E) A, B, and C are correct.

D) carbon (P),Ion

'--..\

,1 . ' r li l i iI

.\

5) How do isotopes differ from eadr other?

A) number of electrons

B) valencr electron distribution . .,2"

C) ability to form ions

D) nurnber of protons ./'.a\@)humber of neutrons

6) How many additional electrons are needed to complete the valence shell of hydrogen?

A)3 B)s c)2 D)*

7) When two atoms are equally electronegative, they will interact to form

A) ions'

B) equal numbers of isotopes.

C) polar covalent bonds.d,'

Qlhonpolar covalent bonds,

E) ionic bonds.

@

'Je y le i r t r l tyrctr \ r i "

Sr t r rr tr\ l[t{,{ \rQuiz 1 1 lZ7 t06 e

lrurrlPlg crroICE. Chooee the one altemative that best comPletes the statement ol answers the question.

1) The mass number of an element can be easily approximated by adding iogether the number of,,-\

( AlProtons and neutrons.

Y) isotopes of the atom.

C) neutrons and electrons.

D) electron orbitals in each energy level'

E) protons and electrons.

2) The atomic number oI neon is 10. Therefore, it

A)has 8 electrons in the outer electron shell.

B) is inert.

C) has an atomic mass of 10.

/fu.,ry a *a n are correct.Y)a,B, *d c *" corr""t.

i,,,, i\ l-,'

3) How does one refer to an atomic form of an element containing the same number of protons but a different

number of neutrons?

A) isomer B) ion C) radioactive otope lar atom

f ra \

4) One dillerence between carbon-l2 | i'Cland carbon-14 (',-C) is that carbon-14 has16 | b

A) 2 more Protons than carbon-12.

B) 2 more electrons than carbon-12.

It) I more neutrons than carbon-l2.

D) Only A and C are cortect.

E) A, B, and C are correct.

l)se the information exhacted ftotn the wiodic table in Flgure 2.2 to answer the lollowing questions'

nx,H-#j';41mmmlFJr,;llfT:rf?lg_l Lgl !_l L1_l [l-] [:J

Figure 2.2

5) How many electrons does sulfur have in its valence shell?

A)4 B)1 c)8 D)2 ',F\' / I E\Y

- \ -

6) If_etom 6x(atomic number 6) were allowed to react with hydrogen, the molecule formed would be

6j u B)x-H c)H=x=H D)H-x-H E)H-x-H\-./ r I

H-X-HIH

r la. ' i " ) i

,J' .- !

dI

4Q{

N u." "_E-@ii--&i-ol:i! t'--J gr2onat

1. Which of the following are the sainE in all atoms g[gn element?a) Number of neutrons. Q),)Number of protons.

c). Mass. d). Atomic weight.

2. If the isotope 12 S has 16 protons and 16 neutrons, how many Brotons and how manyneutrons will the isotope 37 S have? I l, pf bl ltLi( , Zl W6t V"vnS

4,"

Biology 202Quiz I

4..A covalent bond is likely to be polar if:

fa)jone ofthe atoms sharing electrons is much more electronegative than the other atomb'), the two atoms sharing electrons are equally electronegativec). it is between two atoms that are both very strong el€cfton acceptorsd). itjoins a carbon atom and two hydrogen atoms

5 . What is the number of electron pairs carbon shares with oxygen in a

3. Atoms form covalent bonds with each other by:a). sharing protons.

'c). transferring electons from one atom to the other.ftl.'straring el ectrons.d). sharing neutrons.

{,rti{,r' J

1l! /

'o ,

,C, i

molecule of carbpn$ioxide?a). 1 b). 2 c).3 p7!e). s

6. What is the diffgrence between an element and a, compound | ., 4 i" ' .1i ; i rnr; - i i

- +vi i : ' . ' i ,0,, l . ' t t ' r i i r

,o-t. t ,* , ,

"" '1' , ,-- , ' , , t" , ' , ' i i idf,^

, { )h l r r lhtr l i1 l t / tD { ,1 in} ic t l { r*{r l ' ' ' $t i iu . .' . - : : r ' " --t Xl- l ie l ' ! - ?' W t1 t( J {x \u( !1 1 l '1 . :( i ' '

7. In the term trace element, the modifier trace elements means' a) )the element is required in small amounts'bJ-the

element can be used to trace atoms through an organismc) the element is very rare on earthd) the element passes rapidly through the organism

8. What are valence electrons?V Clw.ln Ll 4 W ti r rlt ti

o+ {;.L1 cttarit 'Ihrrt

t14.t 'n{t t l t1.9. Illustrate an example ofhydrogen bonding. , t ..t1. tr rt^

Ii l l,rrulr + i}: ff-l Llri '. Yat' Ltf u/ ry"' 'J ' ' It,,.r'.! : t,:(,.

a . . .u'A"(

1 0. Sodium and Chlorjne combine to form Sodium Chloride by I lilrll L" bond