Question 1

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

Question 2

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. 
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.

Question 3

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

Question 4

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. 
A)  takes place under anaerobic conditions. 
B)  takes place under aerobic conditions. 
C)  The amount of oxygen does not make any difference.

Question 5

Which of the following do NOT fix atmospheric nitrogen?

Accepted Answer

A)  cyanobacteria 
B)  mycorrhizae 
C)  lichens 
D)  Rhizobium 
E)  Azotobacter 
A)  cyanobacteria 
B)  mycorrhizae 
C)  lichens 
D)  Rhizobium 
E)  Azotobacter

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

Question 7

Figure 27.1
  
-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)  V 
A)  I 
B)  II 
C)  III 
D)  IV 
E)  V

Question 8

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)  V 
A)  I 
B)  II 
C)  III 
D)  IV 
E)  V

Question 9

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 10

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

Question 11

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 profundal 
A)  benthic 
B)  littoral 
C)  profundal 
D)  limnetic 
E)  benthic and profundal

Question 12

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

Accepted Answer

A)  ammonification 
B)  nitrification 
C)  nitrogen fixation 
D)  denitrification 
E)  assimilation 
A)  ammonification 
B)  nitrification 
C)  nitrogen fixation 
D)  denitrification 
E)  assimilation

Question 13

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

Question 14

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

Question 15

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. 
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.

Question 16

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

Question 17

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

Question 18

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

Exam 27: Environmental Microbiology

Aerobic respiration occurs in

Biochemical oxygen demand is a measure of the

All of the following organisms are involved in carbon fixation EXCEPT

NH3 → No2-

Which of the following do NOT fix atmospheric nitrogen?

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

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

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

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

Residual chlorine must be maintained in

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

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

Which of the following requires aerobic conditions?

The release of phosphate-containing detergents into a river would

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

Zoogloea form flocculent masses in

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

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

The Microbial World and You

Chemical Principles

Observing Microorganisms Through a Microscope

Functional Anatomy of Prokaryotic and Eukaryotic Cells

Microbial Metabolism

Microbial Growth

The Control of Microbial Growth

Microbial Genetics

Biotechnology and Dna Technology

Classification of Microorganisms

The Prokaryotes: Domains Bacteria and Archaea

The Eukaryotes: Fungi, Algae, Protozoa, and Helminths

Viruses, Viroids, and Prions

Principles of Disease and Epidemiology

Microbial Mechanisms of Pathogenicity

Innate Immunity: Nonspecific Defenses of the Host

Adaptive Immunity: Specific Defenses of the Host

Practical Applications of Immunology

Disorders Associated With the Immune System

Antimicrobial Drugs

Microbial Diseases of the Skin and Eyes

Microbial Diseases of the Nervous System

Microbial Diseases of the Cardiovascular and Lymphatic Systems

Microbial Diseases of the Respiratory System

Microbial Diseases of the Digestive System

Microbial Disease of the Urinary and Reproductive Systems

Applied and Industrial Microbiology

Filters

NH3 → No₂-

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