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Vocabulary1. Monosaccharide2. Active site3. DNA 4. Carbohydrate5. Polypeptide6. Functional Group7. Organic Compound8. Monomer9. RNA10. ATP11. Steroid12. Nucleic acid13. Polymer14. Disaccharide15. Substrate
16. Lipid
17. Nucleotide
18. Wax
19. Phospholipid
20. Macromolecule
21. Hydrolysis
22. Protein23. Amino Acid24. Enzyme25. Polysaccharide26. Peptide bond27. Condensation Reaction
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Carbon
Four electrons in its outermost energy level
Very stable
Can form four covalent bond with other atoms
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Organic Compounds
Most organic compounds have functional groups.
Hydroxyl group of the butanol molecule
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Functional Groups
Functional groups attached to Carbon and influence the properties of the molecule and the chemical reactions the molecules undergo.
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LARGE CARBON MOLECULES
Monomer Polymer x 5 MacromoleculeMonomers link to form polymers through condensation reaction.
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Hydrolysis
Chemical process in which polymers are broken down into monomers with the addition of water
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Molecules of Life
Four main classes of organic compounds are essential to life processes of all living things:
Carbohydrates
Proteins
Lipids
Nucleic Acids
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STRUCTURAL COMPARISONCarbohydrate
1:2:1 Ratio
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Lipids
Polar – carboxyl headNonpolar – hydrocarbon tail
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Steroids
Carbon fused rings
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Nucleic Acids
Monomers = Nucleotides
Phosphate group
Nitrogenous base
Five carbon sugar
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Proteins – Amino Acids (monomers)
Carboxyl groupAmino groupR group – distinguishesOne from another
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Carbohydrates
Composed of carbon, hydrogen, and oxygen in a ratio of about two hydrogen atoms to one oxygen atom.
Exist as monosaccharides, disaccharides, and polysaccharides.
Primary source of energy in living things
Chemically tested by use of Benedict’s Reagent (monosaccharides) and Iodine Test (polysaccharides)
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MonosaccharideSimple Sugar, monomer of carbohydratesBond together to form Disaccharides and PolysaccharidesGlucose, Fructose, Galactose
Disaccharide Double SugarFormed through Condensation Synthesis of two monosaccharidesSucrose = Glucose+ Fructose Lactose = Galactose + GlucoseMaltose = Glucose + Glucose
PolysaccharideStarchFormed through Condensation Synthesis of three or more monosaccharides
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Starch
Two basic formsGlycogen
• Long coil
• Storage polysaccharide in animals
Cellulose• Highly branched
• Storage polysaccharide in plants
Cellulose
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ProteinsComposed mainly of carbon, hydrogen, oxygen, and nitrogen.Composed of many monomers called amino acids to form polypeptide chainsMost enzymes are proteinsChemically tested by Biuret’s test.
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LipidsLarge nonpolar organic molecules that do not dissolve in water.Have a higher ration of carbon and hydrogen atoms to oxygen atoms.Store energyChemically tested using Sudan III or spot testComposed of long fatty acid chains linked to glycerol
Saturated = single bondsUnsaturated = double bondPolyunsaturated = all double or triple bonds
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Fatty acids have a hydrophilic and a hydrophobic end
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Complex lipids
Phospholipid - make up the cell membrane
Wax - a structural lipid which forms a protective coat oncells
Steroids - composed of four fused carbon rings; make up hormones, cholesterol
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Nucleic Acids
Very large complex molecules that store important information in the cell
Composed of chains of nucleotidesPhosphate group
Sugar
Nitrogenous base
DNA or RNA
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EnzymesRNA or protein molecules that act as biological catalysts
Are essential for the functioning of any cell
Enzyme reactions depend on a physical fit between the enzyme molecule and its specific substrate (the reactant being catalyzed)
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Lock and keyfit
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The change in the enzymes shape weakens some chemical bonds in Substrate and reduces the activation energy of the reaction so reactants can become products.
The enzyme is unchanged and is available to be used again.
Enzymes are temperature and pH specificOutside of optimal numbers and the enzyme
changes shape, substrate will not fit.
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Biological reactions + EnzymesIn living things, chemical reactions occur between large, complex biomolecules.
Many of these reactions require large activation energies, the amount of energy needed for the reaction to occur.
Many of these reactions would not occur quickly enough to sustain life without the help of enzymes.
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ACTIVATION ENERGY
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2 reaction types
Exergonic – release more energy than they absorb
Endergonic – Absorb more energy then they
release
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Controlling EnzymesCofactors- enhance enzyme activity
Non-protein component of an enzyme
Coenzyme (organic molecule)
Inorganic molecule
Inhibitors- deactivate enzyme either temporarily or permanently
Reversible
• Competitive-temporarily molecule block active site
• Noncompetitive-molecule binds at another location and slow down the rate of reaction.
• Allosteric-Block active site and stop its functioning
Irreversible-inhibit substrate binding (poisons)