DNA Repair

Review Questions

During proofreading, which of the following enzymes reads the DNA?

  1. primase
  2. topoisomerase
  3. DNA pol
  4. helicase

Hint:

C

The initial mechanism for repairing nucleotide errors in DNA is ________.

  1. mismatch repair
  2. DNA polymerase proofreading
  3. nucleotide excision repair
  4. thymine dimers

Hint:

B

A scientist creates fruit fly larvae with a mutation that eliminates the exonuclease function of DNA pol III. Which prediction about the mutational load in the adult fruit flies is most likely to be correct?

  1. The adults with the DNA pol III mutation will have significantly more mutations than average.
  2. The adults with the DNA pol III mutation will have slightly more mutations than average.
  3. The adults with the DNA pol III mutation will have the same number of mutations as average.
  4. The adults with the DNA pol III mutation will have fewer mutations than average.

Hint:

B