macromolecules - biology with mrs. milanibiologywithmsmilani.weebly.com/uploads/8/2/6/1/...the...
TRANSCRIPT
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Macromolecules
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Warm Up #8
What is a carbohydrate?
What is a protein?
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Read Macromolecules As you read the article, complete the accompanying Biomolecule Chart This chart MUST be glued into your Notebook!
HINT: To complete the Elements Present line, look at the illustrations of the MONOMERS.
When you have completed the reading, work on the Macromolecule Review Questions on the Handout at the front of the room.
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Warm-up #9
Think back to your reading and review questions yesterday…what type of bonds hold polymers together?
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Name of Macro-molecule
Carbohydrates Proteins Nucleic Acids Lipids
Elements
Function
Monomer name
Monomer
Structure
Polymer name
Polymer Structure
Mono-saccharide/ Simple Sugar
1˚ E Source, E storage (animals- glycogen, plants- start), Plant structure (cellulose)
Disaccharide/ Polysaccaride/Starch/
Glycogen
C, H, O
C, H, O, N, P
Store and transmit genetic info
Nucleotide
Nucleic Acid (DNA, RNA)
C, H, O, N
Control rxn rate & cell processes, build body (bones, muslces, expression of DNA)
Amino Acid
Polypeptide/ Protein
1- order aas, 2- folding, 3- 3D 4- >1 polypeptide
C, H, O Cell membranes, protect skin, hormones and vitamens, water-proofing, long-term E storate
Glycerol and fatty acids
Lipids, fats, oils, waxes
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Dehydration Synthesis
The chemical reactions that bond together macromolecules are similar and REQUIRE water
To allow a bond between monomers, a H atom and a OH molecule are removed from the ends of each monomer The H and OH come together to
form a water (H2O) molecule
This is called Dehydration Synthesis
Dehydration – losing water Synthesis – to create
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Hydrolysis When macros. are
consumed, they must be broken down during digestion
To break the covalent bond btn polymers, a water molecule must be split and are used to fill the space created by the broken bond
Hydro – water Lysis- split apart
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Building Macromolecules Our bodies are amazing machines capable of breaking
down and building up complex molecules required for life. Since these molecules are microscopic, it is easier to understand how they are built using models. In this part of the activity, your team will be modeling dehydration and hydrolysis reactions to obtain a better understanding of these processes.
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Building Macromolecules Divide a page in
your Notebook to look like the demo page to the right
Working with your elbow partner, gather the necessary supplies: Instructions
Baggies of pieces
Proteins Carbohydrates
Nucleic Acids Lipids
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Building Macromolecules Following the provided instructions perform dehydration and synthesis reactions for the FOUR different Macromolecules Be sure to answer the questions in the appropriate
section of your page!
Each box should include illustrations!
Once you have completed all reactions, work on the “Building Macromolecules” review questions
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Building Macromolecules: Proteins Assemble ALL four of your Amino Acids so they look
like the picture below:
Once you have done this, follow the instructions to construct and deconstruct proteins. Do NOT forget to sketch these reactions in your Notebook!
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As you start each new section, you will need to rearrange your molecules to look like the diagrams below. It is ESSENTIAL that all FOUR of your monomers look like the monomers below before you start your dehydration and hydrolysis rxns!
Amino Acids
Nucleic Acids
Carbohydrates
Lipids
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Building Macromolecules: Carbohydrates
Assemble ALL four of your Glucose Molecules so they look like the picture below:
Once you have done this, follow the instructions to construct and deconstruct carbohydrates. Do NOT forget to sketch these reactions in your Notebook!
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Building Macromolecules: Nucleic Acids
Assemble ALL four of your Nucleic Acids so they look like the picture below:
Once you have done this, follow the instructions to construct and deconstruct Nucleic Acids. Do NOT forget to sketch these reactions in your Notebook!
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Building Macromolecules: Lipids
Assemble ALL four of your Fatty Acids so they look like the picture below:
Once you have done this, follow the instructions to construct and deconstruct FattyAcids. Do NOT forget to sketch these reactions in your Notebook!
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Carbon
C has 4 outer valence electrons meaning that it can form 4 bonds
It can form single, double, triple, even quadruple bonds with other elements, making it a very unique and versatile elements
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Carbohydrates
Elements Carbon, Hydrogen, and Oxygen
Primary Energy source for cell (fuel for life)
Monomer Monosaccharides (major nutrients for cells)
Disaccharides 2 monosac.s linked together
Polysaccharides: multiple monosac.s linked together
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Proteins Elements
Carbon, Hydrogen, Oxygen, and Nitrogen
Function Control reaction rates and cell process Build body (bones, muscle) Physical expression of DNA!
Monomer Amino acids
Polymer Protein
Amino Acids are joined together by PEPTIDE bonds to create proteins
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Protein Structure 20 different Amino Acids
Humans naturally produce 10
The other 10 “Essential AA” b/c we must get them from our diet
4 Structural levels of polypeptides/proteins
Primary structure- order of amino acids
Secondary structure- coils/pleats (folds)
Tertiary structure- 3-D
Quaternary structure- more than 1 polypeptide
Carboxyl Group Amino Group
Some other atom or group, this is what changes between the 20 different amino acids!
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Lipids Elements
Carbon, Hydrogen, and Oxygen
Function Essential components of all cells (cell
membrane)
Energy storage/reserve
Monomers Glycerol Fatty Acids
Three major lipids in the body Triglycerides, phospholipids, and
cholesterol
Fatty acid
Fatty acid
Fatty acid
Triglyceride
Fatty acid
Fatty acid
Phosphate
Phospholipid
Cholesterol
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Triglycerides
Formed from two building blocks Glycerol and fatty acids
Store a great deal of energy for the body When you eat, your body converts
any calories it doesn’t need to use right away into tri.
The tri are stored in your fat cells
Hormones release tri for energy btn meals
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Phospholipids
Similar to triglyceride Third fatty acid is replaced by a phosphate group
Phosphate end = hydrophilic (loves water)
Fatty acid end = hydrophobic (fears water)
Form cell membranes
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Phospholipid Bilayer
When phospholipids are mixed in water, they will form a stable bilayer structure Phosphate heads facing
the water
Water fearing fatty acid tails facing each other
Hydrophobic tails
Hydrophilic heads
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Cholesterol
Made up of 4 rings of C atoms
Functions in the structure of the plasma membranes of cells
Used to manufacture hormones
High cholesterol and triglycerides in the blood are major cause of heart disease
Cholesterol molecule
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Saturated Fats Fat molecule that are
“saturated” with hydrogen molecules
Typically solid at room temperature
Can raise level of cholesterol in blood
Majority come from animal sources inc. meat and dairy products
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Unsaturated Fats
One or more double bond in the fatty acid chain Monounsaturated = 1
double bond Polyunsaturated = >1
double bond
Liquid at room temp
Examples include avocado, nuts, canola, and olive oils
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Nucleic Acids Elements
Carbon, Hydrogen, Oxygen, Nitrogen, and Phosphorus
Function Store and transmit heredity/genetic info
Monomer Nucleotides
Polymers DNA and RNA
5-Carbon Sugar
Phosphate Group
Nitrogenous Base
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DNA
LARGE macromolecule
Double stranded
Stores heredity information that controls the activities of EVERY cell in the body
deoxyribose sugar
nitrogen base
phosphate
A DNA Nucleotide
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RNA
Single stranded
Carries coded heredity information from the nucleus to the cytoplasm
ribose sugar
nitrogen base
phosphate
An RNA Nucleotide