Brock Biology Of Microorganis 15th Edition By Madigan, Kelly S. – Test Bank

Brock Biology of Microorganisms, 15e (Madigan et al.)

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)

1. A) autotroph.
2. B) auxotroph.
3. C) heterotroph.
4. 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?

1. A) silent mutation
2. B) nonsense mutation
3. C) missense mutation
4. 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)

1. A) deletion.
2. B) insertion.
3. C) point mutation.
4. 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?

1. A) conjugation of an F+ plasmid
2. B) gene transfer through a gene transfer agent
3. C) transduction by a dsDNA phage Mu
4. 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

1. A) alkylating agents.
2. B) nucleotide base analogs.
3. C) chemicals reacting with DNA.
4. 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

1. A) absorption at 260 nm by proteins only.
2. B) absorption at 260 nm by RNA only.
3. C) formation of pyrimidine dimers.
4. D) formation of purine dimers.

Answer:  C

Bloom’s Taxonomy:  1-2: Remembering/Understanding

Chapter Section:  11.4

7) Ionizing radiation does NOT include

1. A) gamma rays.
2. B) UV rays.
3. C) X-rays.
4. 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?

1. A) transformation
2. B) transduction
3. C) conjugation
4. 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 ________.

1. A) transformation / conjugation
2. B) transduction / conjugation
3. C) conjugation / transformation
4. 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?

1. A) an Hfr chromosome
2. B) RecA
3. C) proteins having helicase activity
4. D) endonuclease

Answer:  A

Bloom’s Taxonomy:  1-2: Remembering/Understanding

Chapter Section:  11.5

11) Consider the following experiment. First, large populations of two mutant strains of Escherichia coli are mixed, each requiring a different, single amino acid. After plating them onto a minimal medium, 45 colonies grew. Which of the following may explain this result?

1. A) The colonies may be due to back mutation (reversion).
2. B) The colonies may be due to recombination.
3. C) Either A or B is possible.
4. D) Neither A nor B is possible.

Answer:  C

Bloom’s Taxonomy:  3-4: Applying/Analyzing

Chapter Section:  11.3, 11.5