MMSC491 EXAM 2 (WITH 100% ERRORFREE ANSWERS)

MMSC491 EXAM 2 (WITH 100% ERRORFREE ANSWERS)
Question : Which of the following statements is false regarding
the sources of genetic variation?
a. Most of the inherited changes in our DNA arise because of
exposure to extracellular mutagens, including sources of
chemical mutagens
b. Significant chemical damage is sustained by DNA because of
its proximity to water molecules in our cells
c. Most of the inherited changes in our DNA arise because of
unavoidable endogenous errors in cellular mechanisms and
harmful effects on certain natural molecules and atoms within
our cells
d. Errors in DNA replication and DNA repair are a major source
of mutations in our cells
Correct answer: a. Most of the inherited changes in our DNA
arise because of exposure to extracellular mutagens, including
sources of chemical mutagens
Question : With reference to DNA repair, which of the
following is false?

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