1. A) DNA synthesis.
2. B) biofilm formation.
3. C) transcription.
4. D) translation.
Answer: B
Bloom’s Taxonomy: 3-4: Applying/Analyzing
Chapter Section: 7.10
18) When a Bacillus anthracis population suddenly must form spores to survive a harsh nutrient poor
environment, how do the cells obtain energy?
1. A) Cells in a growth phase that have not used up all of their energy will be the only ones to make
endospores, which is why relatively few endospores are often made from a large population.
2. B) Intracellular energy reserves are quickly made available to produce endospores.
3. C) Slow responding cells are cannibalized by others that already began spore formation.
4. D) Global regulation is initiated to minimize energy waste in biosynthetic pathways and catabolic
pathways are increased to consume remaining usable substrates to fuel spore formation.
Answer: C
Bloom’s Taxonomy: 3-4: Applying/Analyzing
Chapter Section: 7.6
19) Bacteria from the genus Caulobacter are used to model cellular differentiation in eukaryotes. The
abundance of CtrA, DnaA, and GcrA separately control activity of other genes necessary for
differentiation in Caulobacter. Thus, these three proteins can be classified as
1. A) activating sensors.
2. B) heterologous regulators.
3. C) differentiating regulons.
4. D) transcriptional regulators.
Answer: D
Bloom’s Taxonomy: 1-2: Remembering/Understanding
Chapter Section: 7.7
20) A bacterium that either partially or fully catabolizes an acyl-homoserine lactone will likely disrupt
1. A) attenuation.
2. B) chemotaxis.
3. C) endospore formation.
4. D) quorum sensing.
Answer: D
Bloom’s Taxonomy: 3-4: Applying/Analyzing
Chapter Section: 7.9
21) Quorum sensing generally follows the mechanism of which type of regulation?
1. A) feedback inhibition
2. B) negative transcriptional regulation
3. C) positive transcriptional regulation
4. D) a two-component regulation system
Answer: D
Bloom’s Taxonomy: 3-4: Applying/Analyzing
Chapter Section: 7.9
22) Penicillins work by
1. A) activating autolytic enzymes.
2. B) blocking the transpeptidation reaction that forms peptidoglycan cross-links.
3. C) stimulating autolysins to form holes in the plasma membrane.
4. D) All of these answer choices are true.
Answer: D
Bloom’s Taxonomy: 1-2: Remembering/Understanding
Chapter Section: 7.10
23) Differential gene expression occurs in each of the following bacterium EXCEPT
1. A)
2. B)
3. C)
4. D)
Answer: B
Bloom’s Taxonomy: 1-2: Remembering/Understanding
Chapter Section: 7.6
24) σF functions as a(n) ________ during endospore formation.
1. A) transcription factor
2. B) anti-sigma factor
3. C) protease
4. D) RNase
Answer: A
Bloom’s Taxonomy: 1-2: Remembering/Understanding
Chapter Section: 7.6
25) When Spo0A is highly phosphorylated
1. A) heterocyst formation is initiated.
2. B) stalk formation is initiated.
3. C) endospore formation is initiated.
4. D) photosynthesis is initiated.
Answer: C
Bloom’s Taxonomy: 1-2: Remembering/Understanding
Chapter Section: 7.6
26) What is the function of heterocysts in cyanobacteria such as Anabaena?
1. A) nitrogen fixation
2. B) sexual reproduction
3. C) asexual reproduction
4. D) photosynthesis
Answer: A
Bloom’s Taxonomy: 1-2: Remembering/Understanding
Chapter Section: 7.6
27) The major shape-determining factor in Bacteria is the protein
1. A) FtsZ.
2. B) crescentin.
3. C) MreB.
4. D) MinD.
Answer: C
Bloom’s Taxonomy: 1-2: Remembering/Understanding
Chapter Section: 7.3
28) In the process of binary fission in Bacteria, which action occurs first?
1. A) formation of the divisome
2. B) DNA replication
3. C) cell elongation
4. D) cytokinesis
Answer: B
Bloom’s Taxonomy: 3-4: Applying/Analyzing
Chapter Section: 7.3
29) FtsZ is related to ________, an important protein involved in cell division.
1. A) actin
2. B) myosin
3. C) tubulin
4. D) collagen
Answer: C
