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5 Written Questions

5 Matching Questions

  1. Important Cofactors
  2. Secondary
  3. Supra Molecular Assemblies
  4. Topoisomerases
  5. Fatty Acid
  1. a m. wt. = 10^6-10^9; ribosomes, enzyme complexes, contractile systems, microtubules.
  2. b The localized twisting and folding of the polypeptide chain. A specific orientation in space. Two main types: the alpha helix and the beta sheet. Helix- parallel some of the strongest; alpha keratin-nails; spiderwebs. Pleated sheet- anti-parallel; Beta keratin- silk. 18% of all proteins are one of these two shapes; others are random coiling
  3. c alters the topology of DNA molecules.
  4. d NAD+, NADP+, FAD, Coenzyme A
  5. e long hydrocarbon chain ending in a carboxyl group -COOH

5 Multiple Choice Questions

  1. all hydrocarbons have CH2 units (bad for health); animals
  2. one or more double bonds (mostly between 9 and 10); Plant and animals in cold climates.
  3. Needed to disrupt electronic configurations; physiological temperature and pressure too low for most chemical reactions to take place. Enzymes serve to speed up reactions by lowering activation energy.
  4. End-product allosterically inhibits the action of first enzyme in pathway. prevents cell from wasting resources.
  5. occupy another site on the enzyme, altering the active site.

5 True/False Questions

  1. Carbohydratesgeneral formula (CH2O)n; subunits linked by glycosidic bonds; poly hydroxy aldehydes or ketones and their derivatives; functions- structural support, nutrient and energy.


  2. Polysaccharides (glycans)10s-100s of polysaccharides; storage molecules, i.e., cellulose, chitin, glycogen; linear or branched; made of similar or different subunits.


  3. Lipidsfats; long complex hydrocarbon chains; triglycerides, phospholipids in membranes, steroids like cholesterol; are non polar; function in energy storage and the structure of membranes; CH3(CH2)nCOOH n=14-22


  4. NAGN-acetyl muramic acid; important sugar acids in bacterial cell walls


  5. Lactoseglucose and glucose; glucose is a bad sugar


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