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Chapter 5Macromolecules
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Slide 2 of 14
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What is a Macromolecule?
Giant molecule
Consists of thousands of atoms
Carbs, Lipids, Proteins, Nucleic Acids
Polymer is a long molecule composed of similar or identical building blocks
Monomer Building block of a polymer
3 of the 4 macromolecules are polymers
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Macromolecule Function
Carbohydrate Energy & Structural Support
Lipid Energy storage & Membrane components
Nucleic Acids Genetics & Heredity
Proteins Structure, enzymes, transport, & defense
Macromolecules
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Slide 5 of 14
Carbohydrates Lipids
Nucleic Acids Proteins
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Let’s Build a Polymer
Polymerization is a result of dehydration synthesis rxns
Dehydration reaction Removal of water from
molecules Also called Condensation
reaction
Synthesis reaction Building a complex
molecule from simpler components
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Slide 7 of 14
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Slide 8 of 14
Polymer Animation
05_02Polymers_A.swf
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Polymerization has many names
Polysaccharide Glycosidic linkage Monosaccharide + monosaccharide
Polypeptide Peptide bond Amino acid + amino acid
Polynucleotide ???? bond Nucelotide + nucleotide
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Slide 10 of 14
Dehydration Synthesis & Hydrolysis
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Build up or Break Down
• Dehydration Synthesis• Builds a polymer from monomers (Synthesis)• Involves the removal of water (Dehydration or Condensation)
• Hydrolysis• Uses water to break the covalent linkages• Splits apart polymers• Reverse of dehydration synthesis
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Some Questions (Page 1)
1. What is a macromolecule?
2. Name all of the macromolecules.
3. Is there any difference between polymers and macromolecules? Why?
4. What is the relationship between monomer and polymer? Why?
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Some Questions (Page 2)
1. Which macromolecule is not a polymer? Why?
2. What bond type forms from dehydration synthesis? Why?
3. Peptide bonds & glycosidic linkages are what types of bonds? Why?
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Some Questions (Page 3)
4. What is the name of the type of reactions that break apart polymers? Why?
5. You eat a steak, a protein rich food, what type of reactions will begin to take place in the stomach? Why?
6. Do you need to drink water with that steak? Why?