Chapter 8 Microbial Genetics
8.1 Multiple-Choice Questions
1) A gene is defined as
A) any random segment of DNA.
B) three nucleotides that code for an amino acid.
C) a sequence of nucleotides in DNA that codes for a functional product. D) a sequence of
nucleotides in RNA that codes for a functional product. E) the RNA product of a transcribed
section of DNA.
Answer: C Section: 8.1
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Bloom's Taxonomy: Remembering
Learning Outcome: 8.1
2) Which of the following pairs is mismatched?
A) DNA polymerase – makes a molecule of DNA from a DNA template B) RNA polymerase
– makes a molecule of RNA from an RNA template C) DNA ligase – joins segments of DNA
D) transposase – cuts DNA backbone, leaving "sticky ends"
E) DNA gyrase – relaxes supercoiling in DNA ahead of the replication fork
Answer: B Section: 8.1
Bloom's Taxonomy: Remembering
Learning Outcome: 8.3
3) Which of the following statements is FALSE?
A) DNA polymerase joins nucleotides in one direction (5' to 3') only. B) The leading strand
of DNA is made continuously.
C) The lagging strand of DNA is started by an RNA primer.
D) DNA replication proceeds in only one direction around the bacterial chromosome. E)
Multiple replication forks are possible on a bacterial chromosome.
Answer: D Section: 8.1
Bloom's Taxonomy: Understanding
Learning Outcome: 8.3
Global Outcome: 2
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4) DNA is constructed of
A) a single strand of nucleotides with internal hydrogen bonding.
B) two complementary strands of nucleotides bonded A–C and G–T. C) two strands of
nucleotides running in an antiparallel configuration.
D) two strands of identical nucleotides in a parallel configuration with hydrogen bonds between
them.
E) None of the answers is correct. Answer: C
Section: 8.1
Bloom's Taxonomy: Understanding
Learning Outcome: 8.2
Global Outcome: 2
5) Which of the following is NOT a product of transcription? A) a new strand of DNA
B) rRNA C) tRNA D) mRNA
Answer: A Section: 8.1
Bloom's Taxonomy: Understanding
Learning Outcome: 8.4
6) Which of the following statements about bacteriocins is FALSE? A) The genes coding for
them are on plasmids.
B) They cause food-poisoning symptoms.
C) They can be used to identify certain bacteria. D) Bacteriocins kill bacteria.
Answer: B Section: 8.4
Bloom's Taxonomy: Understanding
Learning Outcome: 8.16
Global Outcome: 7
7) Figure 8.1
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8.1 Multiple-Choice Questions
1) A gene is defined as
A) any random segment of DNA.
B) three nucleotides that code for an amino acid.
C) a sequence of nucleotides in DNA that codes for a functional product. D) a sequence of
nucleotides in RNA that codes for a functional product. E) the RNA product of a transcribed
section of DNA.
Answer: C Section: 8.1
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Bloom's Taxonomy: Remembering
Learning Outcome: 8.1
2) Which of the following pairs is mismatched?
A) DNA polymerase – makes a molecule of DNA from a DNA template B) RNA polymerase
– makes a molecule of RNA from an RNA template C) DNA ligase – joins segments of DNA
D) transposase – cuts DNA backbone, leaving "sticky ends"
E) DNA gyrase – relaxes supercoiling in DNA ahead of the replication fork
Answer: B Section: 8.1
Bloom's Taxonomy: Remembering
Learning Outcome: 8.3
3) Which of the following statements is FALSE?
A) DNA polymerase joins nucleotides in one direction (5' to 3') only. B) The leading strand
of DNA is made continuously.
C) The lagging strand of DNA is started by an RNA primer.
D) DNA replication proceeds in only one direction around the bacterial chromosome. E)
Multiple replication forks are possible on a bacterial chromosome.
Answer: D Section: 8.1
Bloom's Taxonomy: Understanding
Learning Outcome: 8.3
Global Outcome: 2
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4) DNA is constructed of
A) a single strand of nucleotides with internal hydrogen bonding.
B) two complementary strands of nucleotides bonded A–C and G–T. C) two strands of
nucleotides running in an antiparallel configuration.
D) two strands of identical nucleotides in a parallel configuration with hydrogen bonds between
them.
E) None of the answers is correct. Answer: C
Section: 8.1
Bloom's Taxonomy: Understanding
Learning Outcome: 8.2
Global Outcome: 2
5) Which of the following is NOT a product of transcription? A) a new strand of DNA
B) rRNA C) tRNA D) mRNA
Answer: A Section: 8.1
Bloom's Taxonomy: Understanding
Learning Outcome: 8.4
6) Which of the following statements about bacteriocins is FALSE? A) The genes coding for
them are on plasmids.
B) They cause food-poisoning symptoms.
C) They can be used to identify certain bacteria. D) Bacteriocins kill bacteria.
Answer: B Section: 8.4
Bloom's Taxonomy: Understanding
Learning Outcome: 8.16
Global Outcome: 7
7) Figure 8.1
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