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1) Pleomorphic bacteria
A) have a slightly curved rod shape.
B) are flexible.
C) reproduce by snapping division.
D) are roughly spherical.
E) vary in size and shape.

E

4) What bacterial structure is responsible for separating the daughter DNA molecules after replication?
A) cross wall
B) cytoplasmic membrane
C) fimbria
D) spindle
E) cytoskeleton

B

5) Endospores
A) are bacterial reproductive structures.
B) can be produced when nutrients are scarce.
C) are produced by bacteria, algae, and fungi.
D) are resistant to everything except radiation.
E) can last for only about 100 years.

B

13) Heterocysts are associated with
A) mycoplasmas.
B) alphaproteobacteria.
C) cyanobacteria.
D) myxobacteria.
E) chlamydias.

C

14) Low G + C Gram-positive bacteria are
A) Mycoplasma.
B) in the phylum Firmicutes.
C) Clostridia.
D) in the phylum Actinobacteria.
E) in the phylum Firmicutes and include Clostridia and Mycoplasma.

E

15) Which of the following diseases is NOT associated with clostridia?
A) tetanus
B) diarrhea
C) gangrene
D) botulism
E) diphtheria

E

16) Mycoplasmas are pleomorphic because they
A) have no cell walls.
B) are low G + C Gram-positive bacteria.
C) exhibit snapping division.
D) have sterols in their cytoplasmic membranes.
E) produce endospores.

A

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

E

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

C

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

B

24) Members of which of the following genera are the most common sexually transmitted bacteria in the United States?
A) Bacteroides
B) Rickettsia
C) Chlamydia
D) Helicobacter
E) Treponema

C

25) Which of the following genera does NOT include intracellular parasites of other cells?
A) Bdellovibrio
B) Chlamydia
C) Rickettsia
D) Borrelia
E) Legionella

D

29) Classification of bacteria into different phyla is based on comparisons involving which of the following?
A) DNA sequences
B) cell wall composition
C) protein sequences
D) both DNA and protein sequences
E) DNA and protein sequences, as well as cell wall composition

D

33) A flexible, spiral-shaped bacterium is called a
A) spirochete.
B) vibrio.
C) coccobacillus.
D) spirillum.
E) sarcina.

A

34) The "giant" bacterium Epulopiscium reproduces by means of
A) binary fission.
B) snapping division.
C) budding.
D) sexual reproduction.
E) viviparity.

E

35) Which of the following statements regarding mycoplasmas is FALSE?
A) They are low G + C bacteria.
B) They stain Gram-positive.
C) They are pleomorphic.
D) They exhibit a "fried egg" appearance on solid media.
E) They are the smallest free-living cells.

B

36) The anaerobic Clostridium species are troublesome pathogens largely because of their capacity for
A) endospore production.
B) rapid reproduction.
C) oxygen production.
D) biofilm production.
E) high salt tolerance.

A

37) Prokaryotes of the genus Pyrodictium are
A) endospore formers.
B) intracellular parasites.
C) members of the deeply branching bacteria.
D) halophiles.
E) thermophiles.

E

38) The __________ include the genus Aquifex.
A) archaea
B) proteobacteria
C) deeply branching bacteria
D) high G + C Gram-positive bacteria
E) clostridia

C

39) The bacterium Bacillus cereus is
A) an endospore former.
B) a frequent contaminant of milk and meat.
C) responsible for food poisoning from rice.
D) the cause of gastric ulcers.
E) an endospore former responsible for food poisoning from rice.

E

40) Listeria is responsible for
A) gastric ulcers.
B) contaminated milk and meat.
C) urinary tract infections.
D) tuberculosis.
E) "flesh-eating" bacterial infections.

B

41) One species of the genus Streptococcus is the leading cause of
A) tuberculosis.
B) urinary tract infections.
C) contaminated milk and meat.
D) "flesh-eating" bacterial infections.
E) food poisoning from rice.

D

42) The genus Mycobacterium includes species responsible for
A) tuberculosis.
B) urinary tract infections.
C) food poisoning from contaminated dairy products.
D) gastric ulcers.
E) food poisoning from rice.

A

43) The genus Helicobacter is responsible for
A) food poisoning from contaminated meat.
B) food poisoning from rice.
C) gastric ulcers.
D) tuberculosis.
E) urinary tract infections.

C

44) Members of the genus Chlamydia are
A) thermophiles.
B) intracellular parasites.
C) classified with the deeply branching bacteria.
D) endospore-formers.
E) Gram-positive bacteria.

B

45) Pseudomonas species are occasional causes of
A) food poisoning from contaminated meat.
B) food poisoning from rice.
C) food poisoning from dairy products.
D) "flesh-eating" bacterial infection.
E) urinary tract infections.

E

1) The majority of archaea are extremophiles.

B

2) When an endospore germinates, it gives rise to two daughter cells called vegetative cells.

B

3) Members of the Streptomyces are environmentally important because they can degrade a wide range of compounds including lignin from trees, chitin and keratin from animals, and latex.

A

4) Halophiles grow equally well in the presence or absence of high salt concentrations.

B

5) Cyanobacteria contain chlorophyll a and carry out anoxygenic photosynthesis.

B

6) Cocci can be spherical as well as kidney-shaped.

A

7) Some strains of Staphylococcus aureus can invade the body and cause diseases such as pneumonia and bacteremia.

A

8) Mycoplasmas are named for the large quantities of mycolic acid in their cell walls.

B

9) Most of the methane produced by methanogens is oxidized by other types of bacteria before it affects the Earth's climate.

A

10) Myxobacteria exhibit traits, such as cooperation and differentiation, that are not normally observed in prokaryotes.

A

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