Question 1

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

Accepted Answer

A) True 
 B)False

Question 2

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 3

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

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 4

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

Accepted Answer

The answer of A newspaper headline reported ʺAlgal Bloom Kills...

Question 5

All of the following are used in secondary sewage treatment EXCEPT

Accepted Answer

A)  trickling filters. 
B)  aeration. 
C)  sludge granules or floc formation. 
D)  activated sludge. 
E)  anaerobic digestion. 
A)  trickling filters. 
B)  aeration. 
C)  sludge granules or floc formation. 
D)  activated sludge. 
E)  anaerobic digestion.

Question 6

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

Accepted Answer

A) True 
 B)False

Question 7

Bacteria can increase the Earthʹs temperature by

Accepted Answer

A)  using the greenhouse gas Co2. 
B)  providing nutrients for plant growth. 
C)  oxidizing CH4. 
D)  producing CH4, which is a greenhouse gas. 
E)  generating a great deal of heat in metabolism. 
A)  using the greenhouse gas Co2. 
B)  providing nutrients for plant growth. 
C)  oxidizing CH4. 
D)  producing CH4, which is a greenhouse gas. 
E)  generating a great deal of heat in metabolism.

Question 8

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 9

Which of the following is an assimilation process?

Accepted Answer

A)  Redwood tree: SO42- → Sulfhydryl groups of amino acids 
B)  Desulfovibrio: SO42- → H2S 
C)  Thiobacillus: H2S → S0 
D)  Proteus: Sulfhydryl-containing amino acids → H2S 
E)  Photosynthetic bacteria: H2S → S0 
A)  Redwood tree: SO42- → Sulfhydryl groups of amino acids 
B)  Desulfovibrio: SO42- → H2S 
C)  Thiobacillus: H2S → S0 
D)  Proteus: Sulfhydryl-containing amino acids → H2S 
E)  Photosynthetic bacteria: H2S → S0

Question 10

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

Question 11

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. 
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.

Question 12

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

Accepted Answer

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

Question 13

All of the following are true of mycorrhizae EXCEPT

Accepted Answer

A)  ectomycorrhizae extend the surface area of roots for nutrient absorption. 
B)  they enable plants to absorb soil nutrients. 
C)  an example is the food delicacy truffles. 
D)  the vesicular-arbuscular mycorrhizae are a type of ectomycorrhizae. 
E)  they are fungi that form beneficial relationships with plants. 
A)  ectomycorrhizae extend the surface area of roots for nutrient absorption. 
B)  they enable plants to absorb soil nutrients. 
C)  an example is the food delicacy truffles. 
D)  the vesicular-arbuscular mycorrhizae are a type of ectomycorrhizae. 
E)  they are fungi that form beneficial relationships with plants.

Question 14

Which of the following is mismatched?

Accepted Answer

A)  N2 + 6H+ → 2NH3  Beijerinckia 
B)  Co2 + 4H2 → CH4 + 2H2O  Methane-producing bacteria 
C)  SO42- + 10H+ → H2S + 4H2O  Desulfovibrio 
D)  6Co2 + 6H2O → C6H12O6 + 6o2  Clostridium 
E)  2 No2- + o2→ 2 NO3  Nitrobacter 
A)  N2 + 6H+ → 2NH3  Beijerinckia 
B)  Co2 + 4H2 → CH4 + 2H2O  Methane-producing bacteria 
C)  SO42- + 10H+ → H2S + 4H2O  Desulfovibrio 
D)  6Co2 + 6H2O → C6H12O6 + 6o2  Clostridium 
E)  2 No2- + o2→ 2 NO3  Nitrobacter

Question 15

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

Question 16

Drinking water supplies are routinely tested for the presence of

Accepted Answer

A)  Vibrio. 
B)  Cryptosporidium. 
C)  Giardia. 
D)  fecal viruses. 
E)  fecal coliforms. 
A)  Vibrio. 
B)  Cryptosporidium. 
C)  Giardia. 
D)  fecal viruses. 
E)  fecal coliforms.

Question 17

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 18

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

Accepted Answer

A) True 
 B)False

Question 19

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

Accepted Answer

A) True 
 B)False

Question 20

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

Exam 27: Environmental Microbiology

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

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

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

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

All of the following are used in secondary sewage treatment EXCEPT

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

Bacteria can increase the Earthʹs temperature by

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

Which of the following is an assimilation process?

Filtration to remove protozoa occurs in

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

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

All of the following are true of mycorrhizae EXCEPT

Which of the following is mismatched?

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

Drinking water supplies are routinely tested for the presence of

6H2S + 6Co2 light 6S0 + glucose

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

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

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

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

6H₂S + 6Co₂ light 6S0 + glucose