Question 1

Which of the following requires aerobic conditions?

Accepted Answer

A)   water treatment
B)   sludge digestion
C)   secondary sewage treatment
D)   primary sewage treatment
E)   nitrogen fixationF) A) and B)
G) B) and E)

Question 2

Figure 27.1
 2)  → NH3? A)  I B)  II C)  III D)  IV E)  V" class="answers-bank-image d-inline" rel="preload" >
-Which step in Figure 27.1 represents the following reaction: amino acid ( -NH2)  → NH3?

Accepted Answer

A)   I
B)   II
C)   III
D)   IV
E)   VF) C) and D)
G) D) and E)

Question 3

In freshwater lakes and ponds, the majority of photosynthetic microbes are located in the zone(s) .

Accepted Answer

A)   benthic
B)   littoral
C)   profundal
D)   limnetic
E)   benthic and profundalF) None of the above
G) D) and E)

Question 4

Zoogloea form flocculent masses in

Accepted Answer

A)   tertiary sewage treatment.
B)   anaerobic sludge digestion.
C)   water treatment.
D)   primary sewage treatment.
E)   activated sludge digestion.F) A) and C)
G) C) and D)

Question 5

The release of phosphate-containing detergents into a river would

Accepted Answer

A)   improve the water quality.
B)   kill algae.
C)   increase algal growth.
D)   kill bacteria.
E)   None of the answers is correct.F) A) and B)
G) C) and D)

Question 6

Figure 27.2
 
-Where are photosynthetic bacteria most likely to be found in Figure 27.2?

Accepted Answer

A)   a
B)   b
C)   c
D)   a and b
E)   b and cF) D) and E)
G) C) and D)

Question 7

All of the following organisms are involved in carbon fixation EXCEPT

Accepted Answer

A)   cyanobacteria.
B)   mycorrhizae.
C)   green and purple sulfur bacteria.
D)   lichens.
E)   algae.F) B) and C)
G) A) and E)

Question 8

The bacteriological safety of drinking water is determined by testing water samples for the presence of human pathogens.

Accepted Answer

A) True 
 B)False

Question 9

NH3 → No2-

Accepted Answer

A)   takes place under anaerobic conditions.
B)   takes place under aerobic conditions.
C)   The amount of oxygen does not make any difference.D) A) and C)
E) All of the above

Question 10

Which of the following terms describes step III in Figure 27.1?

Accepted Answer

A)   ammonification
B)   nitrification
C)   nitrogen fixation
D)   denitrification
E)   assimilationF) A) and B)
G) D) and E)

Question 11

Aerobic respiration occurs in

Accepted Answer

A)   secondary sewage treatment.
B)   tertiary sewage treatment.
C)   anaerobic sludge digestion.
D)   water treatment.
E)   primary sewage treatment.F) B) and D)
G) A) and E)

Question 12

Adding untreated sewage to a freshwater lake would cause the biochemical oxygen demand to

Accepted Answer

A)   decrease.
B)   increase.
C)   stay the same.
D)   The answer cannot be determined based on the information provided.E) C) and D)
F) A) and B)

Question 13

Biochemical oxygen demand is a measure of the

Accepted Answer

A)   amount of organic matter present in a water sample.
B)   number of bacteria present in a water sample.
C)   amount of nitrogen in a water sample.
D)   amount of oxygen present in a water sample.
E)   amount of undissolved solid matter present in a water sample.F) C) and E)
G) B) and C)

Question 14

Figure 27.2
 
-Where are the benthic microbes such as Desulfovibrio and Clostridium most likely to be found in Figure 27.2?

Accepted Answer

A)   a
B)   b
C)   c
D)   b and c
E)   a and bF) C) and D)
G) B) and E)

Question 15

Figure 27.1
 
-Nitrification is beneficial to farmers. It is represented by which step in Figure 27.1?

Accepted Answer

A)   I
B)   II
C)   III
D)   IV
E)   VF) D) and E)
G) A) and B)

Question 16

Which of the following do NOT fix atmospheric nitrogen?

Accepted Answer

A)   cyanobacteria
B)   mycorrhizae
C)   lichens
D)   Rhizobium
E)   AzotobacterF) A) and B)
G) A) and D)

Question 17

Residual chlorine must be maintained in

Accepted Answer

A)   anaerobic sludge digestion.
B)   primary sewage treatment.
C)   secondary sewage treatment.
D)   tertiary sewage treatment.
E)   water treatment.F) A) and D)
G) A) and C)

Question 18

In the ONPG and MUG test for fecal coliforms, a sample that is positive for E. coli will be

Accepted Answer

A)   positive for ONPG; non-fluorescent in UV light.
B)   positive for ONPG; fluorescent in UV light.
C)   negative for ONPG; fluorescent in UV light.
D)   negative for ONPG; non-fluorescent in UV light.E) B) and C)
F) A) and D)

Exam 27: Environmental Microbiology

Which of the following do NOT fix atmospheric nitrogen?

Correct Answer
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NH3 → No₂-

Correct Answer
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Figure 27.2 -Where are photosynthetic bacteria most likely to be found in Figure 27.2?

Correct Answer
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Figure 27.1 -Nitrification is beneficial to farmers. It is represented by which step in Figure 27.1?

Correct Answer
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Which of the following requires aerobic conditions?

Correct Answer
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All of the following organisms are involved in carbon fixation EXCEPT

Correct Answer
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Zoogloea form flocculent masses in

Correct Answer
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In freshwater lakes and ponds, the majority of photosynthetic microbes are located in the zone(s) .

Correct Answer
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Which of the following terms describes step III in Figure 27.1?

Correct Answer
verified

The release of phosphate-containing detergents into a river would

Correct Answer
verified

Biochemical oxygen demand is a measure of the

Correct Answer
verified

Figure 27.2 -Where are the benthic microbes such as Desulfovibrio and Clostridium most likely to be found in Figure 27.2?

Correct Answer
verified

The bacteriological safety of drinking water is determined by testing water samples for the presence of human pathogens.

Correct Answer
verified

Aerobic respiration occurs in

Correct Answer
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Adding untreated sewage to a freshwater lake would cause the biochemical oxygen demand to

Correct Answer
verified

In the ONPG and MUG test for fecal coliforms, a sample that is positive for E. coli will be

Correct Answer
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Figure 27.1 -Which step in Figure 27.1 represents the following reaction: amino acid ( -NH₂) → NH3?

Correct Answer
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Residual chlorine must be maintained in

Correct Answer
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Exam 27: Environmental Microbiology

Which of the following do NOT fix atmospheric nitrogen?

Correct AnswerverifiedShow Answer

NH3 → No2-

Correct AnswerverifiedShow Answer

Figure 27.2 -Where are photosynthetic bacteria most likely to be found in Figure 27.2?

Correct AnswerverifiedShow Answer

Figure 27.1 -Nitrification is beneficial to farmers. It is represented by which step in Figure 27.1?

Correct AnswerverifiedShow Answer

Which of the following requires aerobic conditions?

Correct AnswerverifiedShow Answer

All of the following organisms are involved in carbon fixation EXCEPT

Correct AnswerverifiedShow Answer

Zoogloea form flocculent masses in

Correct AnswerverifiedShow Answer

In freshwater lakes and ponds, the majority of photosynthetic microbes are located in the zone(s) .

Correct AnswerverifiedShow Answer

Which of the following terms describes step III in Figure 27.1?

Correct AnswerverifiedShow Answer

The release of phosphate-containing detergents into a river would

Correct AnswerverifiedShow Answer

Biochemical oxygen demand is a measure of the

Correct AnswerverifiedShow Answer

Figure 27.2 -Where are the benthic microbes such as Desulfovibrio and Clostridium most likely to be found in Figure 27.2?

Correct AnswerverifiedShow Answer

The bacteriological safety of drinking water is determined by testing water samples for the presence of human pathogens.

Correct AnswerverifiedShow Answer

Aerobic respiration occurs in

Correct AnswerverifiedShow Answer

Adding untreated sewage to a freshwater lake would cause the biochemical oxygen demand to

Correct AnswerverifiedShow Answer

In the ONPG and MUG test for fecal coliforms, a sample that is positive for E. coli will be

Correct AnswerverifiedShow Answer

Figure 27.1 -Which step in Figure 27.1 represents the following reaction: amino acid ( -NH2) → NH3?

Correct AnswerverifiedShow Answer

Residual chlorine must be maintained in

Correct AnswerverifiedShow Answer

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NH3 → No₂-

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Figure 27.1 -Which step in Figure 27.1 represents the following reaction: amino acid ( -NH₂) → NH3?

Correct Answer
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Correct Answer
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