Question 1

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

Question 2

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

Accepted Answer

A) True 
 B)False  True

Question 3

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

Question 4

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

Accepted Answer

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

Question 5

6H2S + 6CO2 light 6S0 + glucose

Accepted Answer

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

Question 6

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)  sulfate 
A)  carbonate 
B)  nitrate 
C)  phosphate 
D)  potassium 
E)  sulfate

Question 7

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

Accepted Answer

A) True 
 B)False

Question 8

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 9

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. 
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.

Question 10

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 microbes 
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 microbes

Question 11

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

Accepted Answer

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

Question 12

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 ferrooxidans 
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 ferrooxidans

Question 13

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

Question 14

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

Question 15

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

Question 16

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

Question 17

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 18

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

Question 19

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. 
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.

Question 20

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

Accepted Answer

A) True 
 B)False

Exam 27: Environmental Microbiology

Which of the following is an assimilation process?

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

All of the following organisms are involved in carbon fixation EXCEPT

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

6H2S + 6CO2 light 6S0 + glucose

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

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

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?

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

Which of the following is required for composting?

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

Which of the following is mismatched?

Which of the following requires aerobic conditions?

Zoogloea form flocculent masses in

Residual chlorine must be maintained in

Aerobic respiration occurs in

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

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

Bacteria can increase the Earth's temperature by

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

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 Recombinant Dna

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 Diseases of the Urinary and Reproductive Systems

Applied and Industrial Microbiology

Filters

6H₂S + 6CO₂^light6S⁰+ glucose