Question 1

The guano deposited by seabirds is used a source for which of the following fertilizer components?

Accepted Answer

A)   carbonate
B)   nitrate
C)   phosphate
D)   potassium
E)   sulfateF) A) and C)
G) B) and E)

Question 2

Figure 27.1
 
-Which term in Figure 27.1 describes step V?

Accepted Answer

A)   ammonification
B)   dissimilation
C)   denitrification
D)   nitrification
E)   nitrogen fixationF) A) and B)
G) None of the above

Question 3

Figure 27.1
 
-Which step in Figure 27.1 represents anaerobic respiration?

Accepted Answer

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

Question 4

Zoogloea form flocculent masses in

Accepted Answer

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

Question 5

Untreated sewage is released into a river. Which of the following statements is FALSE?

Accepted Answer

A)   The untreated sewage decreases the dissolved oxygen.
B)   The untreated sewage is a health hazard.
C)   The untreated sewage increases the BOD.
D)   The untreated sewage kills bacteria.
E)   All of the statements are true.F) A) and E)
G) A) 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) A) and D)
G) B) and E)

Question 7

Which of the following is an assimilation process?

Accepted Answer

A)   Thiobacillus: H2S -S0
B)   Photosynthetic bacteria: H2S -S0
C)   Redwood tree: SO42-  -Amino acids
D)   Proteus: Amino acids -H2S
E)   Desulfovibrio: SO42-  -H2SF) B) and E)
G) A) and B) C

Question 8

Which of the following is required for composting?

Accepted Answer

A)   periodic turning or raking of the compost pile
B)   addition of non- biodegradable materials
C)   constant anaerobic conditions
D)   addition of nitrogen and phosphorus sources
E)   addition of thermophilic microbesF) B) and E)
G) D) and E)

Question 9

A newspaper headline reported "Algal Bloom Kills Fish." What actually caused fish death, given that the algae were not toxic? What could have caused the algal bloom?

Accepted Answer

The fish death was actually caused by th...

Question 10

Bacteria can increase the Earth's temperature by

Accepted Answer

A)   providing nutrients for plant growth.
B)   generating a great deal of heat in metabolism.
C)   producing CH4, which is a greenhouse gas.
D)   oxidizing CH4.
E)   using the greenhouse gas CO2.F) A) and C)
G) C) and D)

Question 11

6H2S + 6CO2 light 6S0 + glucose 2S + 6CO2 light 6S0 + glucose   A)  takes place under aerobic conditions. B)  takes place under anaerobic conditions. C)  The amount of oxygen does not make any difference." class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

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

Question 12

Aerobic respiration occurs in

Accepted Answer

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

Question 13

Residual chlorine must be maintained in

Accepted Answer

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

Question 14

Which of the following is mismatched?

Accepted Answer

A)   SO42-  + 10H+ -H2S + 4H2O - Desulfovibrio
B)   6CO2 + 6H2O -C6H12O6 + 6O2 - Clostridium
C)   N2 + 6H+ -2NH3 - Beijerinckia
D)   CO2 + 4H2 -CH4 + 2H2O - Methane- producing bacteria
E)   Fe2+ -Fe3+ - Thiobacillus ferrooxidansF) C) and D)
G) B) and C)

Question 15

Which of the following requires aerobic conditions?

Accepted Answer

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

Question 16

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

Accepted Answer

A)   nitrogen fixation
B)   nitrification
C)   assimilation
D)   denitrification
E)   ammonificationF) A) and C)
G) A) and E)

Question 17

The water from tertiary sewage treatment can be used as drinking water.

Accepted Answer

A) True 
 B)False

Question 18

In small communities lacking municipal sewage systems, sewage is treated in septic systems or oxidation ponds.

Accepted Answer

A) True 
 B)False  True

Question 19

Microorganisms in deep- sea vents and caves serve as autotrophic primary producers in the absence of sunlight.

Accepted Answer

A) True 
 B)False

Question 20

All of the following organisms are involved in carbon fixation EXCEPT

Accepted Answer

A)   green and purple sulfur bacteria.
B)   mycorrhizae.
C)   cyanobacteria.
D)   algae.
E)   lichens.F) None of the above
G) A) and E) B

Exam 27: Environmental Microbiology

The guano deposited by seabirds is used a source for which of the following fertilizer components?

Correct AnswerverifiedShow Answer

Figure 27.1 -Which term in Figure 27.1 describes step V?

Correct AnswerverifiedShow Answer

Figure 27.1 -Which step in Figure 27.1 represents anaerobic respiration?

Correct AnswerverifiedShow Answer

Zoogloea form flocculent masses in

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Untreated sewage is released into a river. Which of the following statements is FALSE?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following is an assimilation process?

Correct AnswerverifiedC

Which of the following is required for composting?

Correct AnswerverifiedShow Answer

A newspaper headline reported "Algal Bloom Kills Fish." What actually caused fish death, given that the algae were not toxic? What could have caused the algal bloom?

Correct AnswerAnswered by ExamLex AIThe fish death was actually caused by th...View AnswerShow Answer

Bacteria can increase the Earth's temperature by

Correct AnswerverifiedShow Answer

6H2S + 6CO2 light 6S0 + glucose

Correct AnswerverifiedShow Answer

Aerobic respiration occurs in

Correct AnswerverifiedShow Answer

Residual chlorine must be maintained in

Correct AnswerverifiedShow Answer

Which of the following is mismatched?

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Which of the following requires aerobic conditions?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The water from tertiary sewage treatment can be used as drinking water.

Correct AnswerverifiedShow Answer

In small communities lacking municipal sewage systems, sewage is treated in septic systems or oxidation ponds.

Correct AnswerverifiedTrue

Microorganisms in deep- sea vents and caves serve as autotrophic primary producers in the absence of sunlight.

Correct AnswerverifiedShow Answer

All of the following organisms are involved in carbon fixation EXCEPT

Correct AnswerverifiedB

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C

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Answered by ExamLex AI
The fish death was actually caused by th...
View Answer

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6H₂S + 6CO₂^light6S⁰+ glucose

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True

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B