Exam 7: Dna Mutation, DNA Repair, and Transposable Elements

5-bromouracil (5BU)is a mutagen because it is an analog of the base thymine and may pair with guanine instead of adenine if it is incorporated into a DNA strand.

Thymine dimers are commonly caused by

Which of the following is not mutagenic?

A tautomer is an uncommon form of DNA base that naturally exists along with the common form.

What kind of mutation-detection procedure can be used to detect the white-eye mutation in Drosophila?

Nonsense suppressors are usually mutations in genes coding for

A cointegrate is characteristic of replicative transposition.

A silent mutation is a change in the DNA sequence that alters the amino acid sequence of the encoded protein but does not change its function.

Genetic manipulation in Drosophila may be assisted by the use of

What are two ways that a reverse mutation can occur?

Dissociation elements (Ds)in plants are examples of

The DNA polymerase proofreading mechanism maintains a low mutation rate in eukaryotic genes.

Spontaneous mutation rates are greatly reduced by

A transposon is

A transposon may carry genes for proteins that enable their transposition as well as genes for other functions such as drug resistance.

Mutation frequency is the

Which procedure would you use to detect a nutritional mutation in microorganisms?

Explain what a mutator gene is and give an example.

How does the nucleotide excision repair (NER)system in E.coli work,and what kinds of DNA damage does it repair?

An mRNA codon reads GUA.If a transition mutation occurs at the third base pair,will the final protein be changed?