Question 1

The Euryarchaeota includes all

Accepted Answer

A)  known thermophilic extreme acidophiles.
B)  the bacteria.
C)  known methanogens.
D)  green sulfur bacteria.E) A) and D)
F) C) and D)

Question 2

Luminescence

Accepted Answer

A)  is catalyzed by luciferase.
B)  may be controlled by quorum sensing.
C)  may be produced by bacteria.
D)  All of the choices are correct.E) B) and D)
F) A) and B)

Question 3

Treponema and Borrelia

Accepted Answer

A)  are luminescent.
B)  are endosymbionts.
C)  are spirochaetes.
D)  are both easily grown on artificial media.E) C) and D)
F) A) and D)

Question 4

It has been estimated that 99% of the intestinal bacteria are

Accepted Answer

A)  facultative anaerobes.
B)  obligate aerobes.
C)  facultative aerobes.
D)  obligate anaerobes.E) B) and D)
F) A) and C)

Question 5

Reticulate and elementary bodies are two forms of

Accepted Answer

A)  Mycoplasma.
B)  Caulobacter.
C)  Chlamydia.
D)  Myxobacteria.E) B) and C)
F) B) and D)

Question 6

Swarmer cells are

Accepted Answer

A)  formed by Myxobacteria.
B)  formed by sheathed bacteria.
C)  also known as coliforms.
D)  part of the green nonsulfur bacteria.E) A) and B)
F) C) and D)

Question 7

Wolbachia are found only in

Accepted Answer

A)  hot springs.
B)  plants.
C)  mammals.
D)  arthropods.E) B) and C)
F) None of the above

Question 8

Bacteria and Archaea both have members that use sulfur compounds as a terminal electron acceptor.

Accepted Answer

A) True 
 B)False

Question 9

A particular characteristic of disease-causing Streptococcus is

Accepted Answer

A)  catalase production.
B)  beta-hemolysis.
C)  lactic acid production.
D)  growth at refrigerator temperatures.E) A) and B)
F) A) and C)

Question 10

Lactic acid bacteria such as Streptococcus are obligate fermenters that can exist in an aerobic environment due to their use of catalase to mitigate the presence of oxygen.

Accepted Answer

A) True 
 B)False

Question 11

Streptomyces produce a number of antibiotics.

Accepted Answer

A) True 
 B)False

Question 12

Obligate aerobes may transform energy via fermentation.

Accepted Answer

A) True 
 B)False

Question 13

Helicobacter pylori

Accepted Answer

A)  inhabit the stomach.
B)  inhabit squid ink sacs.
C)  cause crown gall in plants.
D)  have axonemes.E) B) and C)
F) A) and B)

Question 14

Rhizobium

Accepted Answer

A)  fix nitrogen inside nodules on the roots of legumes.
B)  resemble fungi.
C)  produce antibiotics.
D)  produce a gall in plants.E) A) and B)
F) A) and D)

Question 15

Anoxygenic phototrophs grow photosynthetically only under aerobic conditions.

Accepted Answer

A) True 
 B)False

Question 16

The genomes of free-living spirochaetes are larger than those living in animal hosts.Why might this be so?

Accepted Answer

A)  Free-living spirochetes will need genes to code for additional proteins to synthesize or obtain their own food from the environment around them.Parasitic spirochetes obtain nutrients from the animal host,and may not need to move towards those nutrients either.
B)  The spirochetes in animal hosts are different species entirely.As different species,they would naturally have smaller genomes.
C)  A smaller genome implies simplicity-the spirochetes living in animal hosts have fewer needs,so they need fewer genes.
D)  It isn't so-all spirochetes would have the same size genomes,since they're all the same species of microbe.E) B) and C)
F) A) and D)

Question 17

Propionibacterium

Accepted Answer

A)  produces propionic acid.
B)  produces lactic acid.
C)  is responsible for the holes in Swiss cheese.
D)  requires aerobic environments.
E)  produces propionic acid AND is responsible for the holes in Swiss cheese.F) C) and D)
G) A) and D)

Question 18

The most medically relevant species of Pseudomonas is P.aeruginosa.

Accepted Answer

A) True 
 B)False

Question 19

Sulfuric acid is

Accepted Answer

A)  involved in bioleaching.
B)  produced by unicellular sulfur-oxidizers.
C)  produced by Lactobacillus.
D)  a result of reduction of metal sulfides.
E)  involved in bioleaching AND produced by unicellular sulfur-oxidizers.F) B) and D)
G) B) and E)

Question 20

Which of the following colonize the vagina during childbearing years?

Accepted Answer

A)  Streptococci
B)  Clostridium
C)  Lactobacilli
D)  Enterobacter
E)  Clostridium AND lactobacilliF) A) and E)
G) A) and B)

Exam 11: The Diversity of Prokaryotic Organisms

Helicobacter pylori

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Which of the following colonize the vagina during childbearing years?

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Streptomyces produce a number of antibiotics.

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Reticulate and elementary bodies are two forms of

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Luminescence

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Propionibacterium

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Wolbachia are found only in

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Rhizobium

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The most medically relevant species of Pseudomonas is P.aeruginosa.

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Anoxygenic phototrophs grow photosynthetically only under aerobic conditions.

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The Euryarchaeota includes all

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Swarmer cells are

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Lactic acid bacteria such as Streptococcus are obligate fermenters that can exist in an aerobic environment due to their use of catalase to mitigate the presence of oxygen.

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The genomes of free-living spirochaetes are larger than those living in animal hosts.Why might this be so?

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Sulfuric acid is

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A particular characteristic of disease-causing Streptococcus is

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Bacteria and Archaea both have members that use sulfur compounds as a terminal electron acceptor.

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Treponema and Borrelia

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It has been estimated that 99% of the intestinal bacteria are

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Obligate aerobes may transform energy via fermentation.

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