UNIT 4

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Author:
Anonymous
ID:
61583
Filename:
UNIT 4
Updated:
2011-01-24 03:10:36
Tags:
circulatory
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questions from unit 4
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  1. Identify the four categories of macromolecules that make up living systems, such as your body.
    carbohydrates, lipids, proteins and nucleic acids
  2. Name and describe the process that builds macromolecules.
    dehydration synthesis (removing water to form a covalent bond)
  3. Name and describe the process that breaks down macromolecules.
    • hydrolysis ( adding water which breaks the covalent bond in the macromolecule)
    • involves enyzmes
  4. Identify two types of carbohydrates, and name the subunits that make up each type.
    Simple sugars: dissacharide , monosaccharide

    Polysaccharides: starch,glycogen,cellulose
  5. Identify the subunits that make up fats
    phospholipids, trigylceride
  6. List the key differences betwen a saturated and unsaturated fat.
    • SAT: no double covalent bond between carbon atoms. fat is solid at room temperature
    • UNSAT: double bonds, leaving room for additional hydrogen atoms. fat to be liquid at room temperature
  7. Name the subunits that make up proteins.
    amino acids: individual amino acidsare connected by a peptide bond.
  8. Explain why proteins are more structurally and functionally diverse than carbohydrates and lipids.
    They have more space and room for bonding with other macromolecules and substances
  9. Explain what an enzyme is
    protein molecule that acts as a catalyst to increase the rate of a reaction
  10. Describe how an enzyme speeds up the rate of a chemical reaction.
    When the enzyme fits with its substrate and binds to the active site, the bonds become less stable :. more likely to be altered or reacted to new bonds

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