Question 1

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

Accepted Answer

A) True 
 B)False

Question 2

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

Accepted Answer

A)   nitrate
B)   carbonate
C)   potassium
D)   sulfate
E)   phosphateF) B) and E)
G) C) and D)

Question 3

Sedimentation of sludge occurs 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 B)
G) B) and D)

Question 4

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) A) and B)

Question 5

Filtration to remove protozoa occurs in

Accepted Answer

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

Question 6

All of the following are habitats for extremophiles EXCEPT

Accepted Answer

A)   an acid mine wash.
B)   the topmost portions of the Atlantic Ocean.
C)   a salt-evaporating pond.
D)   100°C water.
E)   inside rock.F) A) and E)
G) A) and C)

Question 7

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) A) and D)
G) C) and D)

Question 8

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

Accepted Answer

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

Question 9

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

Accepted Answer

A)   nitrogen
B)   phosphorus
C)   carbon
D)   sulfurE) A) and B)
F) A) and C)

Question 10

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) B) and D)
F) B) and C) B

Question 11

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

Accepted Answer

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

Question 12

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

Accepted Answer

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

Question 13

In water treatment, the purpose of flocculation is to remove microbes, such as Giardia and
Cryptosporidium.

Accepted Answer

A) True 
 B)False  False

Question 14

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) A) and C) C

Question 15

Which of the following is NOT characteristic of fecal coliforms?

Accepted Answer

A)   lactose-fermenting
B)   rod-shaped
C)   pathogenic
D)   gram-negative
E)   non-spore formingF) A) and B)
G) A) and C)

Question 16

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 17

What stage of sewage treatment produces methane?

Accepted Answer

A)   tertiary treatment
B)   primary treatment
C)   secondary treatment
D)   sludge digestion
E)   None of the stages of sewage treatment produce methane.F) A) and D)
G) A) and E)

Question 18

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 B)
G) D) and E)

Question 19

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 B)
G) A) and C)

Question 20

Which wastewater treatment process is responsible for removal of most of the BOD in sewage?

Accepted Answer

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

Exam 27: Environmental Microbiology

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Sedimentation of sludge occurs in

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Filtration to remove protozoa occurs in

Correct AnswerverifiedShow Answer

All of the following are habitats for extremophiles EXCEPT

Correct AnswerverifiedShow Answer

Aerobic respiration occurs in

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedB

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

In water treatment, the purpose of flocculation is to remove microbes, such as Giardia and Cryptosporidium.

Correct AnswerverifiedFalse

Which of the following requires aerobic conditions?

Correct AnswerverifiedC

Which of the following is NOT characteristic of fecal coliforms?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What stage of sewage treatment produces methane?

Correct AnswerverifiedShow Answer

Zoogloea form flocculent masses in

Correct AnswerverifiedShow Answer

Residual chlorine must be maintained in

Correct AnswerverifiedShow Answer

Which wastewater treatment process is responsible for removal of most of the BOD in sewage?

Correct AnswerverifiedShow Answer

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B

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False

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C

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