11) Which of the following groups of bacteria lives in environments similar to those that may have existed on the early Earth?
- A) deeply branching bacteria
- B) cyanobacteria
- C) mycoplasmas
- D) thermophiles
- E) proteobacteria
Answer: A
Bloom’s Taxonomy: Comprehension
Section: Survey of Bacteria
Learning Outcome: 11.11
12) Aerobic cyanobacteria carry out the reactions of nitrogen fixation in
- A) akinetes.
- B) endospores.
- C) heterocysts.
- D) chloroplasts.
- E) lamellae.
Answer: C
Bloom’s Taxonomy: Knowledge
Section: Survey of Bacteria
Learning Outcome: 11.12
13) Some cyanobacteria reproduce by means of
- A) akinetes.
- B) endospores.
- C) budding.
- D) meiosis.
- E) fragmentation.
Answer: E
Bloom’s Taxonomy: Knowledge
Section: Survey of Bacteria
Learning Outcome: 11.12
14) Bacteria in the phylum Firmicutes are distinguished from the phylum Actinobacteria on the basis of
- A) their Gram stain reaction.
- B) the high G + C content of their DNA.
- C) their spiral shapes.
- D) the low G + C content of their DNA.
- E) the presence of LPS in their membranes.
Answer: D
Bloom’s Taxonomy: Comprehension
Section: Survey of Bacteria
Learning Outcome: 11.15
15) Which of the following diseases is NOT associated with bacteria that form endospores?
- A) tetanus
- B) anthrax
- C) gangrene
- D) botulism
- E) toxic shock syndrome
Answer: E
Bloom’s Taxonomy: Comprehension
Section: Survey of Bacteria
Learning Outcome: 11.2, 11.14
16) Mycoplasmas are pleomorphic because they
- A) have no cell walls.
- B) are low G + C content Gram-positive bacteria.
- C) exhibit snapping division.
- D) have sterols in their cytoplasmic membranes.
- E) produce endospores.
Answer: A
Bloom’s Taxonomy: Comprehension
Section: Survey of Bacteria
Learning Outcome: 11.13
17) Which of the following bacterial genera produce(s) endospores?
- A) Bacillus
- B) Clostridium
- C) Lactobacillus
- D) both Bacillus and Lactobacillus
- E) both Bacillus and Clostridium
Answer: E
Bloom’s Taxonomy: Knowledge
Section: General Characteristics of Prokaryotic Organisms
Learning Outcome: 11.2
18) Which of the following bacterial genera includes species that protect areas of the body such as the intestinal tract and the vagina from invasion by pathogens?
- A) Staphylococcus
- B) Listeria
- C) Lactobacillus
- D) Mycobacterium
- E) Corynebacterium
Answer: C
Bloom’s Taxonomy: Comprehension
Section: Survey of Bacteria
Learning Outcome: 11.14
19) Which of the following groups of bacteria is named for its resemblance to fungi?
- A) Corynebacterium
- B) Actinomyces
- C) Clostridium
- D) Lactobacillus
- E) Staphylococcus
Answer: B
Bloom’s Taxonomy: Knowledge
Section: Survey of Bacteria
Learning Outcome: 11.17
20) Which of the following bacterial genera is used for the degradation of environmental pollutants?
- A) Actinomyces
- B) Streptomyces
- C) Corynebacterium
- D) Rhizobium
- E) Nocardia
Answer: E
Bloom’s Taxonomy: Knowledge
Section: Survey of Bacteria
Learning Outcome: 11.17
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