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5 Written questions

5 Matching questions

  1. Uncompetitive Inhibition
  2. DNA
  3. Carbohydrates
  4. Proteins
  5. Topoisomerases
  1. a 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.
  2. b The inhibitor binds to ES complex so that further reaction does not take place - either forward or backward.
  3. c general formula (CH2O)n; subunits linked by glycosidic bonds; poly hydroxy aldehydes or ketones and their derivatives; functions- structural support, nutrient and energy.
  4. d antiparallel orientation of complimentary strands; DNA is supercoiled in the cells; denaturation and renaturation. ssDNA absorbs more light. RNA can compete with ssDNA hybridization.
  5. e alters the topology of DNA molecules.

5 Multiple choice questions

  1. the actual sequence of the amino acids
  2. pyruvate, citrate, malate, etc.
  3. m. wt. 100-350; nucleotides, amino acids, monosaccharides, fatty acids, glycerol
  4. 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. Biological catalysts- specific for a chemical reaction; not used up in that reaction; Apoenzyme: protein.
    Co-factor: non-protein component; Coenzyme- organic cofactor (NAD, FAD); Holoenzyme-Apoenzyme + cofactor.

5 True/False questions

  1. Oligosaccharidesmost important are disaccharides; covalent linkages of two monosaccharides with the release of H2O (glycosidic bond). i.e. sucrose, lactose, maltose, etc.


  2. NAMN-acetyl neuraminic acid; important sugar acids in bacterial cell walls.


  3. precursors from the environmentamino acid with another component; glycoprotein; nucleoprotein; lipoprotein; phosphoprotein.


  4. Macromoleculesnucleus, mitochondria, golgi bodies, chloroplasts


  5. Ketoseglucose and glucose; glucose is a bad sugar