Brock Biology Of Microorganism 15th Edition By Madigan – Test Bank

Chapter 11 Genetics of Bacteria and Archaea

11.1 Multiple Choice Questions

1) A mutant that has a nutritional requirement for growth is an example of a(n)
A) autotroph.
B) auxotroph.
C) heterotroph.
D) organotroph.
Answer: B
Bloom’s Taxonomy: 1-2: Remembering/Understanding
Chapter Section: 11.1

2) Consider a mutation in which the change is from UAC to UAU. Both codons specify the amino acid tyrosine. Which type of point mutation is this?
A) silent mutation
B) nonsense mutation
C) missense mutation
D) frameshift mutation
Answer: A
Bloom’s Taxonomy: 1-2: Remembering/Understanding
Chapter Section: 11.2

3) A mutation that readily reverses to restore the original parental type would most likely be due to a(n)
A) deletion.
B) insertion.
C) point mutation.
D) frameshift mutation.
Answer: C
Bloom’s Taxonomy: 3-4: Applying/Analyzing
Chapter Section: 11.2

4) Which process listed below allows genetic material to be transferred from a virus-like particle that lacks genes for its own replication?
A) conjugation of an F+ plasmid
B) gene transfer through a gene transfer agent
C) transduction by a dsDNA phage Mu
D) transformation of a linear piece of DNA
Answer: B
Bloom’s Taxonomy: 1-2: Remembering/Understanding
Chapter Section: 11.5, 11.7

5) The mutagens 2-aminopurine and 5-bromouracil are examples of
A) alkylating agents.
B) nucleotide base analogs.
C) chemicals reacting with DNA.
D) None of the answers are correct.
Answer: B
Bloom’s Taxonomy: 1-2: Remembering/Understanding
Chapter Section: 11.4
6) The killing of cells by UV irradiation involves
A) absorption at 260 nm by proteins only.
B) absorption at 260 nm by RNA only.
C) formation of pyrimidine dimers.
D) formation of purine dimers.
Answer: C
Bloom’s Taxonomy: 1-2: Remembering/Understanding
Chapter Section: 11.4

7) Ionizing radiation does NOT include
A) gamma rays.
B) UV rays.
C) X-rays.
D) cosmic rays.
Answer: B
Bloom’s Taxonomy: 1-2: Remembering/Understanding
Chapter Section: 11.4

8) Which of the following methods may introduce foreign DNA into a recipient?
A) transformation
B) transduction
C) conjugation
D) transformation, transduction, and conjugation
Answer: D
Bloom’s Taxonomy: 1-2: Remembering/Understanding
Chapter Section: 11.8

9) The uptake of free DNA from the environment ________, while transfer of DNA with cell-to-cell contact would most likely result in ________.
A) transformation / conjugation
B) transduction / conjugation
C) conjugation / transformation
D) transformation / transduction
Answer: A
Bloom’s Taxonomy: 1-2: Remembering/Understanding
Chapter Section: 11.8

10) Which of the following is NOT required for homologous recombination?
A) an Hfr chromosome
B) RecA
C) proteins having helicase activity
D) endonuclease
Answer: A
Bloom’s Taxonomy: 1-2: Remembering/Understanding
Chapter Section: 11.5