Question 1

You have isolated an aerobic gram-positive, endospore-forming bacterium that grows well on nutrient agar. To which of the following groups does it most likely belong?

Accepted Answer

A)   deltaproteobacteria
B)   bacillales
C)   phototrophic bacteria
D)   gammaproteobacteria
E)   The answer cannot be determined based on the information provided.F) C) and E)
G) A) and B)

Question 2

Staphylococcus and Streptococcus can be easily differentiated in a laboratory by which one of the following?

Accepted Answer

A)   glucose fermentation
B)   growth in high salt concentrations
C)   ability to cause disease
D)   cell shape
E)   Gram stain reactionF) B) and C)
G) B) and E)

Question 3

Which of the following statements about the causative agent of Rocky Mountain spotted fever is FALSE?

Accepted Answer

A)   It is transmitted by ticks.
B)   It is gram-negative.
C)   It is found in soil and water.
D)   It is in the genus Rickettsia.
E)   It is an intracellular parasite.F) B) and C)
G) A) and B)

Question 4

Which of the following bacteria does NOT belong with the others?

Accepted Answer

A)   Halococcus
B)   Sulfolobus
C)   Methanobacterium
D)   Staphylococcus
E)   HalobacteriumF) D) and E)
G) B) and C)

Question 5

Thiobacillus oxidizes inorganic sulfur compounds and reduces CO₂. This bacterium is a

Accepted Answer

A)   chemoheterotroph.
B)   chemoautotroph.
C)   gammaproteobacteria.
D)   photoheterotroph.
E)   photoautotroph.F) All of the above
G) B) and C)

Question 6

Which of the following are found primarily in the intestines of humans?

Accepted Answer

A)   facultatively anaerobic gram-negative rods
B)   gram-negative aerobic rods and cocci
C)   endospore-forming rods
D)   gram-positive cocci
E)   aerobic, helical bacteriaF) D) and E)
G) C) and D)

Question 7

All of the following bacteria are gram-positive. Which does NOT belong with the others?

Accepted Answer

A)   Gardnerella
B)   Listeria
C)   Corynebacterium
D)   Actinomyces
E)   MycobacteriumF) B) and E)
G) D) and E)

Question 8

Streptomyces differs from Actinomyces because Streptomyces

Accepted Answer

A)   makes antibiotics.
B)   forms filaments.
C)   is a strict aerobe.
D)   is a bacterium.
E)   produces conidia.F) A) and B)
G) A) and C)

Question 9

Which of the following bacteria are responsible for more infections and more different kinds of infections?

Accepted Answer

A)   Pseudomonas
B)   Streptococcus
C)   Neisseria
D)   Staphylococcus
E)   SalmonellaF) D) and E)
G) A) and D)

Question 10

Which of the following bacteria is gram-negative?

Accepted Answer

A)   Bacillus
B)   Mycobacterium
C)   Treponema
D)   Corynebacterium
E)   StaphylococcusF) B) and D)
G) B) and E)

Question 11

The deinococci can be categorized as extremophiles.

Accepted Answer

A) True 
 B)False

Question 12

Which of the following is NOT a characteristic of Neisseria?

Accepted Answer

A)   Some species are human pathogens.
B)   cocci
C)   gram-negative
D)   oxidase-positive
E)   requires X and V factorsF) B) and C)
G) C) and D)

Question 13

Both Beggiatoa and the purple sulfur bacteria use H2S. These bacteria differ in that Beggiatoa

Accepted Answer

A)   belongs to the gammaproteobacteria.
B)   uses H2S for a carbon source.
C)   uses H2S for an energy source.
D)   uses light energy.
E)   is a heterotroph.F) A) and C)
G) B) and C)

Question 14

Which of the following is NOT a characteristic of spirochetes?

Accepted Answer

A)   found in the human oral cavity
B)   easily observed with brightfield microscopy
C)   possess an axial filament
D)   helical shape
E)   gram-negativeF) A) and B)
G) All of the above

Question 15

Burkholderia was reclassified from the gammaproteobacteria to the betaproteobacteria because

Accepted Answer

A)   it causes infections in cystic fibrosis patients.
B)   it is a gram-negative rod.
C)   its rRNA sequence is similar to that of Neisseria.
D)   it causes melioidosis.
E)   it grows in disinfectants.F) B) and C)
G) None of the above

Question 16

Photosynthetic organisms always produce oxygen gas as a metabolic byproduct.

Accepted Answer

A) True 
 B)False

Question 17

The majority of bacterial species on Earth have not been successfully cultivated.

Accepted Answer

A) True 
 B)False

Question 18

Two distinguishing factors of the epsilonproteobacteria that they are motile and microaerophilic.

Accepted Answer

A) True 
 B)False

Question 19

The human body is typically free of archaeal species.

Accepted Answer

A) True 
 B)False

Question 20

The nonsulfur photosynthetic bacteria use organic compounds as

Accepted Answer

A)   electron donors to reduce CO₂.
B)   energy sources.
C)   electron acceptors.
D)   carbon sources.
E)   oxygen sources.F) All of the above
G) C) and D)

Exam 11: The Prokaryotes: Domains Bacteria and Archaea

Photosynthetic organisms always produce oxygen gas as a metabolic byproduct.

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All of the following bacteria are gram-positive. Which does NOT belong with the others?

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Two distinguishing factors of the epsilonproteobacteria that they are motile and microaerophilic.

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Staphylococcus and Streptococcus can be easily differentiated in a laboratory by which one of the following?

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Streptomyces differs from Actinomyces because Streptomyces

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Which of the following bacteria are responsible for more infections and more different kinds of infections?

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The nonsulfur photosynthetic bacteria use organic compounds as

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Which of the following is NOT a characteristic of Neisseria?

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Thiobacillus oxidizes inorganic sulfur compounds and reduces CO₂. This bacterium is a

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Which of the following is NOT a characteristic of spirochetes?

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Which of the following are found primarily in the intestines of humans?

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The majority of bacterial species on Earth have not been successfully cultivated.

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Which of the following bacteria is gram-negative?

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Which of the following bacteria does NOT belong with the others?

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You have isolated an aerobic gram-positive, endospore-forming bacterium that grows well on nutrient agar. To which of the following groups does it most likely belong?

Correct AnswerverifiedShow Answer

Both Beggiatoa and the purple sulfur bacteria use H2S. These bacteria differ in that Beggiatoa

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The deinococci can be categorized as extremophiles.

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Burkholderia was reclassified from the gammaproteobacteria to the betaproteobacteria because

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The human body is typically free of archaeal species.

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Which of the following statements about the causative agent of Rocky Mountain spotted fever is FALSE?

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