Deck 13: Gene Mutations, Transposable Elements, and Dna Repair

Question 1

What kind of transposition causes an increase in the copy number of transposable elements?
a.All transpositions increase the copy number of transposable elements.
b.nonreplicative transposition
c.replicative transposition
d.mutagenic transposition
e.none of the above

Answer 1

replicative transposition

Question 2

What kind of chemical mutagen would produce hydroxyl radicals during aerobic metabolism?
a.base analog
b.agent that causes oxidation
c.alkylating agent
d.deamination
e.hydroxylamine

Answer 2

agent that causes oxidation

Question 3

Which of the following is NOT a reason that mutations are important?
a.Mutations provide genetic stability.
b.Mutations can cause diseases and disorders.
c.Mutations direct evolution.
d.Mutations help researchers understand biological processes.

Answer 3

Mutations p rovide genetic stability .

Question 4

Which is NOT true of transposable elements?
a.Their movement will not cause mutations.
b.They often generate short flanking direct repeats.
c.Many will possess short terminal inverted repeats.
d.They are mobile DNA.
e.All of the above are true.

Question 5

The disease Xeroderma pigmentosum results from DNA-repair defects.People with this disease are sensitive to UV light and have atypical skin pigmentation.Thus these people have higher incidences of what other disease?
a.albinism
b.skin cancer
c.X-linked disease
d.none of the above

Question 6

An_______ error occurs when a mismatched base has been incorporated into a newly synthesized nucleotide chain.When this DNA is copied,this error leads to an_____ error.
a.replication; incorporated
b.tautomeric; replication
c.incorporated; replication
d.incorporated; tautomeric
e.tautomeric; incorporated

Question 7

A mutation on gene X that overrides the effect of a previous mutation on gene Y is called what?
a.reverse mutation
b.intragenic suppressor mutation
c.intergenic suppressor mutation
d.neutral mutation
e.forward mutation

Question 8

Which of the following is NOT true regarding the mutagenic nature of transposition?
a.It can disrupt the function of a gene.
b.It can cause DNA rearrangements.
c.Researchers use the mutagenic nature of transposons to study gene function.
d.There is no evidence that transposition is regulated.