Question 1

The purpose of tertiary sewage treatment is to remove all of the phosphorus, nitrogen, and BOD left from secondary treatment.

Accepted Answer

A) True 
 B)False

Question 2

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

Accepted Answer

A)   profundal
B)   benthic and profundal
C)   littoral
D)   benthic
E)   limneticF) A) and E)
G) A) and C)

Question 3

Which of the following do NOT fix atmospheric nitrogen?

Accepted Answer

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

Question 4

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)   a and b
E)   b and cF) A) and E)
G) A) and D)

Question 5

Which wastewater treatment process produces BOD- containing effluent used for irrigation?

Accepted Answer

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

Question 6

Based on your knowledge of extremophiles and endoliths, describe the characteristics you would expect of microorganisms capable of living on Mars or other non- Earth environments.

Accepted Answer

Microorganisms capable of living on Mars...

Question 7

The dense growth of algae in an algal bloom leads to increased oxygen levels in lakes that enhance the habitat for fish.

Accepted Answer

A) True 
 B)False

Question 8

Filtration to remove protozoa occurs in

Accepted Answer

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

Question 9

The BOD is a measurement of the amount of bacteria present before and after the sewage treatment process.

Accepted Answer

A) True 
 B)False

Question 10

Which of the following is NOT characteristic of fecal coliforms?

Accepted Answer

A)   lactose- fermenting
B)   non- spore forming
C)   rod- shaped
D)   pathogenic
E)   gram- negativeF) All of the above
G) D) and E)

Question 11

In the early 1900s, cities such as Philadelphia reduced the incidence of typhoid fever by

Accepted Answer

A)   requiring residents to boil drinking water.
B)   isolating human carriers.
C)   filtering municipal drinking water through sand- bed filters.
D)   using tertiary water treatment systems.
E)   mass vaccination of residents.F) D) and E)
G) C) and D)

Question 12

Which of the following is NOT a symbiotic pair of organisms?

Accepted Answer

A)   elk and rumen bacteria
B)   orchid and mycorrhizae
C)   sulfur and Thiobacillus
D)   onions and arbuscules
E)   bean plant and RhizobiumF) C) and D)
G) A) and D)

Question 13

Which of the following organisms is using sulfur as a source of energy?

Accepted Answer

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

Question 14

Nitrogen fixation by bacteria occurs only in the root nodules of leguminous plants.

Accepted Answer

A) True 
 B)False

Question 15

Sedimentation of sludge occurs in

Accepted Answer

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

Question 16

Bioremediation involves the use of microbes to degrade or detoxify pollutants.

Accepted Answer

A) True 
 B)False

Question 17

All of the following are true of mycorrhizae EXCEPT

Accepted Answer

A)   ectomycorrhizae form a mantle over plant roots.
B)   an example is the food delicacy truffles.
C)   they are fungi that form beneficial relationships with plants.
D)   the vesicular- arbuscular mycorrhizae are a type of ectomycorrhizae.
E)   they enable plants to absorb soil nutrients.F) A) and B)
G) A) and C)

Question 18

All of the following are used in secondary sewage treatment EXCEPT

Accepted Answer

A)   bulking and floc formation.
B)   aeration.
C)   activated sludge.
D)   anaerobic digestion.
E)   trickling filters.F) B) and D)
G) B) and C)

Question 19

For the biogeochemical cycles of the following elements, which does NOT have an atmospheric cycle?

Accepted Answer

A)   sulfur
B)   phosphorus
C)   nitrogen
D)   carbonE) All of the above
F) A) and B)

Question 20

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

Accepted Answer

A) True 
 B)False

Exam 27: Environmental Microbiology

For the biogeochemical cycles of the following elements, which does NOT have an atmospheric cycle?

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In the early 1900s, cities such as Philadelphia reduced the incidence of typhoid fever by

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Which of the following is NOT characteristic of fecal coliforms?

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Which of the following do NOT fix atmospheric nitrogen?

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Filtration to remove protozoa occurs in

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Based on your knowledge of extremophiles and endoliths, describe the characteristics you would expect of microorganisms capable of living on Mars or other non- Earth environments.

Correct AnswerAnswered by ExamLex AIMicroorganisms capable of living on Mars...View AnswerShow Answer

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

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The purpose of tertiary sewage treatment is to remove all of the phosphorus, nitrogen, and BOD left from secondary treatment.

Correct AnswerverifiedShow Answer

Sedimentation of sludge occurs in

Correct AnswerverifiedShow Answer

Which of the following organisms is using sulfur as a source of energy?

Correct AnswerverifiedShow Answer

Which wastewater treatment process produces BOD- containing effluent used for irrigation?

Correct AnswerverifiedShow Answer

The dense growth of algae in an algal bloom leads to increased oxygen levels in lakes that enhance the habitat for fish.

Correct AnswerverifiedShow Answer

Bioremediation involves the use of microbes to degrade or detoxify pollutants.

Correct AnswerverifiedShow Answer

The BOD is a measurement of the amount of bacteria present before and after the sewage treatment process.

Correct AnswerverifiedShow Answer

Which of the following is NOT a symbiotic pair of organisms?

Correct AnswerverifiedShow Answer

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

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Nitrogen fixation by bacteria occurs only in the root nodules of leguminous plants.

Correct AnswerverifiedShow Answer

All of the following are true of mycorrhizae EXCEPT

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All of the following are used in secondary sewage treatment EXCEPT

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Microorganisms capable of living on Mars...
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