Question 1

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

Accepted Answer

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

Question 2

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

Question 3

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 4

Coliforms detected in water samples always have a fecal source.

Accepted Answer

A) True 
 B)False

Question 5

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

Accepted Answer

A) True 
 B)False

Question 6

Besides the use of chlorine,other method(s)used to disinfect municipal water include

Accepted Answer

A) ozone. 
B) nitrite. 
C) flocculant. 
D) UV light. 
E) both UV light and ozone. 
A) ozone. 
B) nitrite. 
C) flocculant. 
D) UV light. 
E) both UV light and ozone.

Question 7

Which of the following terms describes NO₃⁻ → NO₂⁻ → N₂O → N₂?

Accepted Answer

A) ammonification 
B) denitrification 
C) nitrification 
D) nitrogen fixation 
E) anaerobic respiration 
A) ammonification 
B) denitrification 
C) nitrification 
D) nitrogen fixation 
E) anaerobic respiration

Question 8

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

Accepted Answer

A) carbon 
B) phosphorus 
C) sulfur 
D) nitrogen 
A) carbon 
B) phosphorus 
C) sulfur 
D) nitrogen

Question 9

Drinking water supplies are routinely tested for the presence of

Accepted Answer

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

Question 10

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

Accepted Answer

A) True 
 B)False

Question 11

What is true about the sulfur cycle?

Accepted Answer

A) H₂S is the oxidized form of sulfur. 
B) Green and purple photosynthesizing bacteria oxidize H₂S. 
C) Sulfates are utilized to become part of the carbohydrate molecules. 
D) H₂S represents a source of energy for some autotrophic bacteria. 
E) Both green and purple photosynthesizing bacteria oxidize H₂S and H₂S represents a source of energy for some autotrophic bacteria. 
A) H₂S is the oxidized form of sulfur. 
B) Green and purple photosynthesizing bacteria oxidize H₂S. 
C) Sulfates are utilized to become part of the carbohydrate molecules. 
D) H₂S represents a source of energy for some autotrophic bacteria. 
E) Both green and purple photosynthesizing bacteria oxidize H₂S and H₂S represents a source of energy for some autotrophic bacteria.

Question 12

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 13

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

Accepted Answer

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

Question 14

Differentiate endomycorrhizae from ectomycorrhizae and give an example of each.

Accepted Answer

Endomycorrhizae and ectomycorrhizae are

Question 15

An oil spill occurred in the waters near a local beach and the oil is depositing on the shore.Describe the methods that might be used to clean up the spill that involve the activity of microorganisms.Include a discussion of the limitations for each method.

Accepted Answer

There are several methods that involve t

Question 16

All of the following organisms are involved in carbon fixation EXCEPT

Accepted Answer

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

Question 17

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

Accepted Answer

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

Question 18

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

Accepted Answer

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

Question 19

Which of the following is required for composting?

Accepted Answer

A) addition of non-biodegradable materials 
B) addition of nitrogen and phosphorus sources 
C) periodic turning or raking of the compost pile 
D) addition of thermophilic microbes 
E) constant anaerobic conditions 
A) addition of non-biodegradable materials 
B) addition of nitrogen and phosphorus sources 
C) periodic turning or raking of the compost pile 
D) addition of thermophilic microbes 
E) constant anaerobic conditions

Question 20

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

Accepted Answer

A) True 
 B)False

Exam 27: Environmental Microbiology

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

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

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.

Coliforms detected in water samples always have a fecal source.

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

Besides the use of chlorine,other method(s)used to disinfect municipal water include

Which of the following terms describes NO₃⁻ → NO₂⁻ → N₂O → N₂?

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

Drinking water supplies are routinely tested for the presence of

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

What is true about the sulfur cycle?

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?

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

Differentiate endomycorrhizae from ectomycorrhizae and give an example of each.

An oil spill occurred in the waters near a local beach and the oil is depositing on the shore.Describe the methods that might be used to clean up the spill that involve the activity of microorganisms.Include a discussion of the limitations for each method.

All of the following organisms are involved in carbon fixation EXCEPT

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

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

Which of the following is required for composting?

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

The Microbial World and You

Chemical Principles

Observing Microorganisms Through a Microscope

Functional Anatomy of Prokaryotic and Eukaryotic

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 Diseases of the Urinary and Reproductive Systems

Applied and Industrial Microbiology

Filters