Question 1

Which statement about septic tanks is correct

Accepted Answer

A) Pouring poisons and grease down the drain may kill the tank's beneficial microbes. 
B) Sludge moves continually into a drainage leaching field. 
C) Drainage fields last for more than 50 years. 
D) Two of these choices. 
A) Pouring poisons and grease down the drain may kill the tank's beneficial microbes. 
B) Sludge moves continually into a drainage leaching field. 
C) Drainage fields last for more than 50 years. 
D) Two of these choices.

Question 2

The most usable form of sulfur by microorganisms and plants is:

Accepted Answer

A) sulfide 
B) sulfate 
C) hydrogen sulfide 
D) sulfhydryl 
A) sulfide 
B) sulfate 
C) hydrogen sulfide 
D) sulfhydryl

Question 3

In the sulfur cycle many microbes convert sulfhydryl (-SH)groups to _____,which is toxic to living things.

Accepted Answer

A) hydrogen sulfate 
B) hydrogen sulfide 
C) HSH 
D) sulfate 
A) hydrogen sulfate 
B) hydrogen sulfide 
C) HSH 
D) sulfate

Question 4

Which of the following is used to control the of microbes in the air

Accepted Answer

A) UV light 
B) triethylene glycol 
C) cellulose acetate filters 
D) all of these choices 
A) UV light 
B) triethylene glycol 
C) cellulose acetate filters 
D) all of these choices

Question 5

The most problematic yet common form of tertiary treatment of water is:

Accepted Answer

A) chlorine 
B) UV light 
C) ozone 
D) X-rays 
A) chlorine 
B) UV light 
C) ozone 
D) X-rays

Question 6

Which of the following statements about biogeochemical cycles is true

Accepted Answer

A) Not all living microbes require carbon. 
B) Nitrogen fixing bacteria must be in association with legumes. 
C) Thiobacillus oxidizes hydrogen sulfide to sulfuric acid. 
D) Cyanobacteria are the primary symbiotic nitrogen fixer. 
A) Not all living microbes require carbon. 
B) Nitrogen fixing bacteria must be in association with legumes. 
C) Thiobacillus oxidizes hydrogen sulfide to sulfuric acid. 
D) Cyanobacteria are the primary symbiotic nitrogen fixer.

Question 7

Molds in soil serve to:

Accepted Answer

A) aid in decomposition 
B) aid in nitrogen-fixation 
C) form a network with mycelia 
D) two of these choices 
A) aid in decomposition 
B) aid in nitrogen-fixation 
C) form a network with mycelia 
D) two of these choices

Question 8

How does Sphaerotilus interfere with an activated sludge system

Accepted Answer

A) by coating rocks with a slimy film and decomposing organic matter 
B) by removing flocculating substances 
C) by proliferating and allowing floating matter to carry contaminants into sewage effluent 
D) by converting nitrates to nitrogen gas and blocking the nitrogen stripping tank 
A) by coating rocks with a slimy film and decomposing organic matter 
B) by removing flocculating substances 
C) by proliferating and allowing floating matter to carry contaminants into sewage effluent 
D) by converting nitrates to nitrogen gas and blocking the nitrogen stripping tank

Question 9

The most predominant microbial group found in soil is:

Accepted Answer

A) fungi 
B) bacteria 
C) protozoa 
D) viruses 
A) fungi 
B) bacteria 
C) protozoa 
D) viruses

Question 10

Which is the order of purification procedures for water

Accepted Answer

A) flocculation → chlorination → filtration → particulate settling 
B) synthetic organic chemicals → particulate settling → filtration 
C) chlorination → filtration → particulate settling → nitrification 
D) particulate settling → flocculation treatment → filtration → chlorination 
A) flocculation → chlorination → filtration → particulate settling 
B) synthetic organic chemicals → particulate settling → filtration 
C) chlorination → filtration → particulate settling → nitrification 
D) particulate settling → flocculation treatment → filtration → chlorination

Question 11

Which would not be the habitat for terrestrial species of some microorganisms

Accepted Answer

A) desert 
B) tundra 
C) tropical rain forest 
D) freshwater lake 
A) desert 
B) tundra 
C) tropical rain forest 
D) freshwater lake

Question 12

Which is a primary symbiotic nitrogen fixer

Accepted Answer

A) Azotobacter 
B) Rhizobium 
C) Cyanobacteria 
D) Clostridium 
A) Azotobacter 
B) Rhizobium 
C) Cyanobacteria 
D) Clostridium

Question 13

In the phosphorous cycle,inorganic phosphates are converted to _____,a water-soluble nutrient used by both plants and microorganisms.

Accepted Answer

A) phosphorous 
B) hydrophosphates 
C) orthophosphate 
D) betaphosphate 
A) phosphorous 
B) hydrophosphates 
C) orthophosphate 
D) betaphosphate

Question 14

Producers obtain CO₂ from _____.

Accepted Answer

A) eating other producers 
B) the atmosphere 
C) dead bodies 
D) coal 
A) eating other producers 
B) the atmosphere 
C) dead bodies 
D) coal

Question 15

Which bacteria assisted in cleaning up after the Gulf oil spill crisis

Accepted Answer

A) Halobacterium 
B) Desulfurovibrio 
C) Thiobacillus 
D) Arthrobacter 
A) Halobacterium 
B) Desulfurovibrio 
C) Thiobacillus 
D) Arthrobacter

Question 16

Soil contains human pathogens,for instance _____.

Accepted Answer

A) Clostridium tetani 
B) Bacillus anthracis 
C) Clostridium perfringens 
D) all of these choices 
A) Clostridium tetani 
B) Bacillus anthracis 
C) Clostridium perfringens 
D) all of these choices

Question 17

Sulfur oxidation is carried out by _____.

Accepted Answer

A) Thiobacillus 
B) Desulfovibrio 
C) Desulfomonas 
D) Desulfotomaculum 
A) Thiobacillus 
B) Desulfovibrio 
C) Desulfomonas 
D) Desulfotomaculum

Question 18

Nitrogen-fixing bacteria:

Accepted Answer

A) oxidize ammonia to nitrates or nitrites 
B) oxidize ammonia to nitrous oxide 
C) reduce nitrates to nitrites 
D) reduce nitrogen gas to ammonia 
A) oxidize ammonia to nitrates or nitrites 
B) oxidize ammonia to nitrous oxide 
C) reduce nitrates to nitrites 
D) reduce nitrogen gas to ammonia

Question 19

Which term is correctly matched with its definition

Accepted Answer

A) biotic factors - interaction of organisms with other organisms 
B) ecology - all organisms in a given area with abiotic and biotic factors 
C) ecosystem - organisms that are always found in a given environment 
D) niche - recycling of life-essential elements and water 
A) biotic factors - interaction of organisms with other organisms 
B) ecology - all organisms in a given area with abiotic and biotic factors 
C) ecosystem - organisms that are always found in a given environment 
D) niche - recycling of life-essential elements and water

Question 20

A niche includes all of the following except:

Accepted Answer

A) the taxonomy of an organism 
B) the role an organism plays in the ecosystem 
C) an organisms use of abiotic factors in its environment 
D) the interactions an organism has with other organisms 
A) the taxonomy of an organism 
B) the role an organism plays in the ecosystem 
C) an organisms use of abiotic factors in its environment 
D) the interactions an organism has with other organisms

Exam 26: Environmental Microbiology

Which statement about septic tanks is correct

The most usable form of sulfur by microorganisms and plants is:

In the sulfur cycle many microbes convert sulfhydryl (-SH)groups to _____,which is toxic to living things.

Which of the following is used to control the of microbes in the air

The most problematic yet common form of tertiary treatment of water is:

Which of the following statements about biogeochemical cycles is true

Molds in soil serve to:

How does Sphaerotilus interfere with an activated sludge system

The most predominant microbial group found in soil is:

Which is the order of purification procedures for water

Which would not be the habitat for terrestrial species of some microorganisms

Which is a primary symbiotic nitrogen fixer

In the phosphorous cycle,inorganic phosphates are converted to _____,a water-soluble nutrient used by both plants and microorganisms.

Producers obtain CO₂ from _____.

Which bacteria assisted in cleaning up after the Gulf oil spill crisis

Soil contains human pathogens,for instance _____.

Sulfur oxidation is carried out by _____.

Nitrogen-fixing bacteria:

Which term is correctly matched with its definition

A niche includes all of the following except:

Scope and History of Microbiology

The Microbiome

Fundamentals of Chemistry

Microscopy and Staining

Characteristics of Prokaryotic and Eukaryotic Cells

Essential Concepts of Metabolism

Growth and Culturing of Bacteria

Microbial Genetics

Gene Transfer and Genetic Engineering

An Introduction to Taxonomy: The Bacteria

Viruses

Eukaryotic Microorganisms and Parasites

Sterilization and Disinfection

Antimicrobial Therapy

Host-Microbe Relationships and Disease Processes

Epidemiology and Nosocomial Infections

Innate Host Defenses

Basic Principles of Adaptive Immunity and Immunization

Immune Disorders

Diseases of the Skin and Eyes; Wounds and Bites

Urogenital and Sexually Transmitted Diseases

Diseases of the Respiratory System

Oral and Gastrointestinal Diseases

Cardiovascular, Lymphatic, and Systemic Diseases

Diseases of the Nervous System

Applied Microbiology

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