PROTEIN ENZYME OF DNA REPLICATION-  WEEK2
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Questions and Answers

If an organism had a DNA polymerase III that lost its ability to proofread, which of the following statements would be TRUE?

  • DNA could not be synthesized, and the organism would die.
  • . DNA polymerase III would randomly add new nucleotides, and the entire sequence of new DNA would be worthless. The organism would die.
  • The mutation rate for the organism would increase, and more substitutions would be seen in its DNA than in an organism that had functional proofreading. (correct)
  • . The proofreading ability of RNA polymerase would restore the lost proofreading ability of the DNA polymerase III, and the organism would be normal.
  • : Raising the temperature to over 50C ___ the rate of an enzymatic reaction.

  • lowers
  • increases
  • inhibit (correct)
  • slows
  • DNA polymerases use their ________ activity to remove a mismatched base pair.

  • 3’-5' exonuclease (correct)
  • 5’-3' exonuclease
  • RNase
  • protease.
  • Lowering the pH for an enzyme that works best in a highly acidic environment ___ the rate for the reaction.

    <p>inhibit</p> Signup and view all the answers

    the presence of an enzyme .... the required energy of activation of a chemcial reaction

    <p>lower</p> Signup and view all the answers

    Arrange the following proteins in the proper order in which they participate in DNA replication: 1= Primase 2= Helicase 3= Single-Strand Binding Proteins 4= DNA Polymerase III

    <p>2, 3, 1, 4</p> Signup and view all the answers

    Generally, as the amount of substrate is increased, the rate of the reaction is _____.

    <p>increased</p> Signup and view all the answers

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