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5 Written questions

5 Matching questions

  1. Uncompetitive Inhibition
  2. NAG
  3. amino acid
  4. Quarternary
  5. Proteins
  1. a N-acetyl neuraminic acid; important sugar acids in bacterial cell walls.
  2. b +NH3-CHR-COO-; dipolar charges neutralize each other; side chain determines the charge. Carboxylic group and amino group form the peptide bond (H2O leaves). Peptide glycosidic bonds most important; 150 in our body only 20 make proteins. you have 3AA that make a tripeptide 3^3= 27 different combinations. more than 200 AA in a protein on average.
  3. c The inhibitor binds to ES complex so that further reaction does not take place - either forward or backward.
  4. d Made up of repeating units of amino acids (about 20 types); Subunits linked by peptide bonds forming polymers; Function: structural support, antibodies, contractile fibers, toxins, transport.
  5. e an aggregation of two or more individual polypeptide chains; polymerase- polymeric heteromeric; hemoglobin- homomeric 4 subunits.

5 Multiple choice questions

  1. End-product allosterically inhibits the action of first enzyme in pathway. prevents cell from wasting resources.
  2. all hydrocarbons have CH2 units (bad for health); animals
  3. alters the topology of DNA molecules.
  4. most important are disaccharides; covalent linkages of two monosaccharides with the release of H2O (glycosidic bond). i.e. sucrose, lactose, maltose, etc.
  5. 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

5 True/False questions

  1. Nucleic AcidsSugar + Base + Phosphate; N-glycosidic bond- base; phosphodiester bond- phosphate


  2. Southern Hybridizationdiagnostic technique; denature and add a known fluoresced DNA. Don't have to know base structure.


  3. Important CofactorsNAD+, NADP+, FAD, Coenzyme A


  4. NucleotideSugar + Base + Phosphate; N-glycosidic bond- base; phosphodiester bond- phosphate


  5. NucleosideSugar + Base


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