TEST BANK FOR GENETICS PRACTICE EXAM
SET WITH CORRECT SOLUTIONS
◉ AP repair acts on nucleotides that: Answer: lost their base
◉ Which of the following chemicals is a base analog? Answer: 5-
bromouracil
◉ Over a wide range of X-ray doses, when the radiation dose is
increased, the mutation rate Answer: increases linearly
◉ (T to C) or (A to G) mutations are: Answer: transition mutations
◉ Base substitutions that create a new stop codon are called: Answer:
nonsense mutations
◉ (T to A) or (G to T) mutations are: Answer: transversion mutations
◉ Mutations that change the nucleotide sequence without changing the
amino acid sequence are: Answer: silent mutations
, ◉ A test for carcinogens and mutagens that looks for an increased
reversion frequency in a His- strain of bacteria is called the: Answer:
AMES test
◉ Ultraviolet light primarily damages DNA by: Answer: forming
pyrimidine dimers
◉ Which of the following is only found in prokaryotes? Answer:
Polycistronic mRNA
◉ Which of the following is true regarding RNA processing? Answer: It
occurs in the nucleus
◉ Which of the following features is common to both DNA replication
and transcription? Answer: A sugar-phosphate bond is formed between
the 3' hydroxyl and the 5' phosphate
◉ All of the following may result from promoter mutations except:
Answer: Mutant RNA polymerase
◉ Which of the following is characteristic of prokaryotic mRNA?
Answer: A short half-life
◉ Introns with primary eukaryotic transcripts: Answer: Vary
considerably in size and number among different genes
SET WITH CORRECT SOLUTIONS
◉ AP repair acts on nucleotides that: Answer: lost their base
◉ Which of the following chemicals is a base analog? Answer: 5-
bromouracil
◉ Over a wide range of X-ray doses, when the radiation dose is
increased, the mutation rate Answer: increases linearly
◉ (T to C) or (A to G) mutations are: Answer: transition mutations
◉ Base substitutions that create a new stop codon are called: Answer:
nonsense mutations
◉ (T to A) or (G to T) mutations are: Answer: transversion mutations
◉ Mutations that change the nucleotide sequence without changing the
amino acid sequence are: Answer: silent mutations
, ◉ A test for carcinogens and mutagens that looks for an increased
reversion frequency in a His- strain of bacteria is called the: Answer:
AMES test
◉ Ultraviolet light primarily damages DNA by: Answer: forming
pyrimidine dimers
◉ Which of the following is only found in prokaryotes? Answer:
Polycistronic mRNA
◉ Which of the following is true regarding RNA processing? Answer: It
occurs in the nucleus
◉ Which of the following features is common to both DNA replication
and transcription? Answer: A sugar-phosphate bond is formed between
the 3' hydroxyl and the 5' phosphate
◉ All of the following may result from promoter mutations except:
Answer: Mutant RNA polymerase
◉ Which of the following is characteristic of prokaryotic mRNA?
Answer: A short half-life
◉ Introns with primary eukaryotic transcripts: Answer: Vary
considerably in size and number among different genes
