organic – molecules that contain carbon chemistry of life is study of the chemistry of carbon
TRANSCRIPT
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• Organic – molecules that contain CARBON
• Chemistry of LIFE is study of the chemistry of carbon
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Proteins, lipids, carbohydrates and nucleic
acids
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BiologicalMacromolecule
All biological macro-molecule are made up of a small number
of elements
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• Carbon
• Hydrogen
• Oxygen
• Nitrogen
• Phosphorus
• Sulfur
Remember: CHONPS
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Chemistry of Carbon
• Carbon – can form bonds with FOUR other atoms
• Carbon can bond with itself for form rings, straight chains, or branched chains
• Variety of organic compounds is due to the ability of carbon to bond in many ways
• Carbon and hydrogen combine to form hydrocarbons
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• Are the backbone to all macromolecules
• Different elements bond to hydrocarbons to form the different macromolecules
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Three out of the 4 types of biochemical macromolecules
can be found on food nutrition labels…
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Look at the label to the left. 3 of the 4 macromolecules can
be found in foods. The 3 biochemical molecules
found on a nutrition label are:
1____________________
2____________________
3____________________
(0 grams in this product)
(13 grams in this product)
(9 grams in this product)
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ENERGY
Three of the BIG 4 provide Three of the BIG 4 provide us with energy through the us with energy through the food we eat:food we eat:BIG 4
MACROMOLECULES
Number of Calories it provides
Carbohydrates
Proteins
Lipids
Nucleic Acids
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ENERGY
Energy that is gained by Energy that is gained by consuming food is called a consuming food is called a
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Energy Gained From Carbohydrates
Eating 1 gram of carbohydrate provides your body with 4 Calories.
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Energy Gained from LipidsEating 1 gram of fat provides your body with
9 Calories. Notice if you eat 1 gram of fat, you are gaining
more than twice the amount of Calories than from a gram of carbohydrate or protein!
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ENERGY So…So…
BIG 4 MACROMOLECULES
Number of Calories it provides
Carbohydrates 4
Proteins 4
Lipids 9
Nucleic Acids 0
TEST: TEST: Are you smart? If you eat a sandwhich with 46 grams of carbs and 24 grams of protein and 10 grams of fat, how much energy
will you gain?
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Before you can understand the topics Before you can understand the topics in this unit there are some key in this unit there are some key
vocabulary terms you need to know.vocabulary terms you need to know.
MonomerMonomer
PolymerPolymer
MacromoleculeMacromolecule
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What does “Mono” mean?
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• Mono means ONE
• single molecule unit
• Building block of polymer
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Next Word…..
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Polygons
Polyester
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• Poly means many
• many monomers bonded together
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A PolymerA PolymerHere are some analogies to better
understand what polymers and monomers are….
EXAMPLE of POLYMER
MONOMER
A TRAIN ?
A NECKLACE ?
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A PolymerA PolymerHere are some analogies to better
understand what polymers and monomers are….
EXAMPLE of POLYMER
MONOMER
A TRAIN THE CARS
A NECKLACE EACH PEARL
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Now you and a buddy
need to think of at least 2 other analogies for a polymer and its
monomers.
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• Polymers are made of monomers!
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What do these words mean?
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So What Is A Macromolecule?
Large Polymer
made of many smaller structural units linked together
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How are macromolecules formed?
• Dehydration Synthesis Reaction: Remove water to join two monomers together
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Hydrolysis
• Add water to break bonds between monomers
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When studying these biochemical molecules, we are interested in
finding out…..• FUNCTION - what they do for living
things.
• STRUCTURE - what they look like and how they are built
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NUCLEIC ACIDS
The types of Nucleic Acids–DNA (DeoxyriboNucleic Acid)
–RNA (RiboNucleic Acid)
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“DNA” is short for DeoxyriboNucleic Acid• Now you know why they just call it DNA!
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LET’S BEGIN WITH CARBOHYDRATES
They are the main source of energy. They are our fuel!
They make up the cell wall in plants which allow them to grow tall, without this carbohydrate, a plant would be a mushy mess! This type of carbohydrate is called Cellulose.
THINK: CARBS= ENERGY and CELL WALLS
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CARBOHYDRATES
•In plant foods- in the cell In plant foods- in the cell walls of plants --- in fruits, walls of plants --- in fruits, vegetables, peas, beans, vegetables, peas, beans, SUGAR comes from a plant SUGAR comes from a plant and so does FLOUR! (pasta, and so does FLOUR! (pasta, potatoes, bread, candy, potatoes, bread, candy, cookies)cookies)
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•In animal products- in MILKIn animal products- in MILK
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CARBOHYDRATES
THERE ARE 2 TYPES OF THERE ARE 2 TYPES OF CARBOHYDRATESCARBOHYDRATES
SimpleSimple ComplexComplex
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Simple Sugars are carbohydrates made up of 1 or 2 monomers.
They also taste sweet.
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Simple Sugars
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Complex Carbohydrates…What are they?
Complex Cabohydrates are polymers Complex Cabohydrates are polymers made up of many monomers.made up of many monomers.
Most also taste starchy.Most also taste starchy.
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Complex Carbohydrates
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CARBOHYDRATES
Carbohydrates are chains Carbohydrates are chains (polymers) made of (polymers) made of
monomers. The most common monomers. The most common monomer of carbohydrates monomer of carbohydrates
is…is…
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The shape of Glucose is a hexagonal ring
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CARBOHYDRATES
Each carbohydrate is made up Each carbohydrate is made up of…of…
THINK: “CHO”THINK: “CHO”
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NOW ONTO PROTEINS
They are the major structural molecules in living things for growth and repair : muscles, ligaments, tendons, bones, hair, skin, nails…IN FACT ALL CELL MEMBRANES have protein in them
They make up antibodies in the immune system
They make up enzymes for helping chemical reactions
They makeup non-steriod hormones which
THINK: Proteins= membranes, enzymes, antibodies, non-steriod hormones, structural molecules, “MEANS”
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MORE ON PROTEINS…
The following slides The following slides give you a little more give you a little more
in depth info on in depth info on things that are made things that are made
of proteins…of proteins…
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Muscles, ligaments, tendons, and bones
Without these particular structural proteins, we would look more like this….
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Well, maybe not exactly…Well, maybe not exactly…
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Hair, Skin, and Nails
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Microscope View ofSkin and Nails
This is skin This is a nail
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Cell Membrane
The cell membrane surrounds everything in a cell so it doesn’t leak out. It is kind of like the balloon in a water balloon.
The cell membrane is made mostly of protein AND lipids.
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Antibodies are part of the immune system. When something enters the body that isn’t supposed to be
there, like certain bacteria, antibodies find the invader and stick themselves onto it. When a white blood cell finds the invader covered with antibodies, it knows it
doesn’t belong there and kills it.
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Enzymes are proteins that speed up chemical reactions. If you didn’t have enzymes in your
stomach to speed up digestion, the food would rot in your stomach because it would take so long!
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Hormones are chemicals made in glands that are in one place in the body and then put into the blood to be used in another.
These are where the
hormone producing
glands are located
in your body.
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The thyroid is found in the middle of your neck, by your voice box. Here is a picture of those cells secreting the thyroid hormone.
Thyroid hormone regulates how fast your body uses energy. If you have an over active thyroid, you use energy quickly and tend to be
very thin and have a hard time putting on weight.
If you have an under active thyroid gland, you use energy very slowly and tend to carry more body fat and have a difficult time losing it.
Don’t be quick to think you have a thyroid problem if you are overweight, chances are it’s actually your eating and exercise habits!
(The yellow stuff isthyroid hormone)
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PROTEINS
•In plant foods- in the cell In plant foods- in the cell membranes membranes
•In animal products- in the In animal products- in the cell membranes- in the cell membranes- in the muscles or living things- muscles or living things- cows, chicken, fish…cows, chicken, fish…
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Proteins
Aside from the protein Aside from the protein found in animal sources…found in animal sources…protein can also be found in protein can also be found in fruits, vegetables, grains, fruits, vegetables, grains, and nuts. and nuts. (it just does not have as many amino acids)(it just does not have as many amino acids)
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PROTEINS
Proteins are made of long Proteins are made of long chains (polymers) made of chains (polymers) made of monomers. All proteins are monomers. All proteins are
made of the monomer…made of the monomer…
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The shapes of proteins are like a balled up piece of
string
Amino Acid
chain
All wound
up
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PROTEINS
Each protein is made up of…Each protein is made up of…
THINK: “CHONS”THINK: “CHONS”
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LIPIDS ARE NEXT
They are a great source of STORED ENERGY so we have it in the future.
They INSULATE the body to maintain normal body temperature and they CUSHION the internal organs for protection.
They produce hormones for the body called STERIODS
They waterproof surfaces of animals,plants, and fruits- these are waxes!
THINK: Waterproof, insulate, steriods, energy, cushion… “WISE C”
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LIPIPS…Some interesting info
•Fruits produce a waxy coating to keep from drying out.
• The cells in a tulip make a wax which helps coat the leaves.
•Ear wax traps dust, sand, and other foreign particles from going deeper into the ear and causing damage.
•Beeswax- a structural material to hold honey in the hive
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LIPIPS…Some interesting info
There are many different types of There are many different types of steroids. They are all lipids. Their steroids. They are all lipids. Their functions vary. Some common functions vary. Some common steroids are:steroids are:
SEX STEROIDSSEX STEROIDS ANABOLIC ANABOLIC STERIODSSTERIODS
CHOLESTEROLCHOLESTEROLLike testosterone Like testosterone and estrogenand estrogen
They increase They increase musclemuscle
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LIPIPS…Some interesting info
Some anabolic Some anabolic steroids are steroids are illegalillegal
And can be dangerous and
very unhealthy
NATURAL STERIODS IN OUR NATURAL STERIODS IN OUR BODY INCREASE MUSCLE BODY INCREASE MUSCLE
GROWTH AND BONE GROWTH AND BONE DEVELOPMENT AND ARE DEVELOPMENT AND ARE
GOOD. THE ILLEGAL ONES GOOD. THE ILLEGAL ONES THAT ARE SYNTHETIC ARE THAT ARE SYNTHETIC ARE
BAD.BAD.
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LIPIDS
•In plants- in the seedsIn plants- in the seeds
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•In animals- in adipose tissue, In animals- in adipose tissue, connective tissue, in animalsconnective tissue, in animals
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•Lipids make up the cell Lipids make up the cell membrane of all cells. membrane of all cells.
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LIPIDS
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LIPIDS
Lipids are chains (polymers) Lipids are chains (polymers) made of monomers. The most made of monomers. The most
common monomer of lipids common monomer of lipids is…is…
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The Shape of a triglyceride is like the letter E
This is a triglyceride molecule
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LIPIDS
Each carbohydrate is made up Each carbohydrate is made up of…of…
THINK: “CHO”THINK: “CHO”
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OH NO CHO! Lipids like Carbs?
You might have noticed that both carbohydrates and lipids have the elements Carbon, Hydrogen, and Oxygen.
“CHO”
A carbohydrate, has twice as many hydrogen atoms as the number of oxygen atoms.
EX: C6H12O6
(This is a carb= there are double the number of H compared to O)
On the other hand, lipids have a lot more than twice the amount hydrogen atoms as the number of oxygen atoms.
EX: C27H46O cholesterol
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Energy that we gain by the consumption of food is measured in Calories.
If you drink a glass of skim milk, you will get a gain of 90 Calories of energy for your body.
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Nucleic acidsThe nucleic acids in food are not considered a substance that the body uses to gain
energy.
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Simple tests can detect the presence of proteins, lipids and carbohydrates in given samples
(i.e. various food items)
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Testing for carbohydrates•Lugol's reagent (iodine solution)•Benedict's solution
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Testing for the presence of starch (complex sugar)
Lugol's reagent (iodine
solution) changes from
yellowish-brown to dark purple/black.
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Testing for simple carbohydrates
Benedict's solution is used to test for
simple carbohydrates.
Benedict's solution is a blue colored
liquid that contains copper ions.
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Testing for simple carbohydrates
When Benedict's solution and simple carbohydrates are heated,
the solution changes to orange red/ brick red.
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Testing for lipids•Grease spot test/Brown paper test•Sudan Red test
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Brown paper test for lipids
As we all know from
experience, lipids leave translucent
spots (grease spots) on
unglazed brown paper bags.
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Sudan Red test for lipids
Sudan red is a fat-soluble dye
that stains lipids red. Using
Sudan red can show the
amount and the location of
lipids.
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Testing for proteins – Buiret test
Buiret solution is a blue liquid that changes to purple when
proteins are present and to pink in the presence of short chains of polypeptides. The copper atom of
the biuret solution reacts with the peptide bonds to cause the
color change.
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Testing for proteins – Buiret test