Question 1

The loss of water from pores of plant leaves is called

Accepted Answer

A)  transpiration 
B)  respiration 
C)  evaporation 
D)  two of the above 
A)  transpiration 
B)  respiration 
C)  evaporation 
D)  two of the above A

Question 2

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 B

Question 3

The sulfur cycle is of special importance to

Accepted Answer

A)  terrestrial life 
B)  Pseudomonas 
C)  proteolytic bacteria 
D)  aquatic life 
A)  terrestrial life 
B)  Pseudomonas 
C)  proteolytic bacteria 
D)  aquatic life D

Question 4

Nitrogen-fixing bacteria include

Accepted Answer

A)  cyanobacteria 
B)  Clostridium 
C)  Klebsiella 
D)  all of the above 
A)  cyanobacteria 
B)  Clostridium 
C)  Klebsiella 
D)  all of the above

Question 5

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

Question 6

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 7

The mechanism whereby Rhizobium and the legume associate is characterized by all of the following except

Accepted Answer

A)  multiplies in the vicinity of legume roots 
B)  bacteria release proteases to digest cell wall 
C)  change from free-living to swarmer cells 
D)  swarmers invade root hairs to become bacteroids 
A)  multiplies in the vicinity of legume roots 
B)  bacteria release proteases to digest cell wall 
C)  change from free-living to swarmer cells 
D)  swarmers invade root hairs to become bacteroids

Question 8

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 9

Sulfate-reducing bacteria are characteristically

Accepted Answer

A)  being strict anaerobes 
B)  Desulfovibrio 
C)  utilizing sulfate as a final electron acceptor 
D)  all of the above 
A)  being strict anaerobes 
B)  Desulfovibrio 
C)  utilizing sulfate as a final electron acceptor 
D)  all of the above

Question 10

What is the meaning of biological oxygen demand (BOD)? Why is it important for pollution? What do microbes have to do with this?

Accepted Answer

Biological oxygen demand is the oxygen r

Question 11

The indicator organism for human pathogens in a water supply is

Accepted Answer

A)  Escherichia coli 
B)  Salmonella typhi 
C)  Poliovirus 
D)  Staphylococcus aureus 
A)  Escherichia coli 
B)  Salmonella typhi 
C)  Poliovirus 
D)  Staphylococcus aureus

Question 12

Some microbes can survive drought by forming

Accepted Answer

A)  fimbriae 
B)  spores 
C)  cysts 
D)  two of the above 
A)  fimbriae 
B)  spores 
C)  cysts 
D)  two of the above

Question 13

In testing for water purity,the presumptive test would include

Accepted Answer

A)  Eosin-methylene blue agar 
B)  lactose broth 
C)  nutrient agar 
D)  Gram stain 
A)  Eosin-methylene blue agar 
B)  lactose broth 
C)  nutrient agar 
D)  Gram stain

Question 14

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 15

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 16

What are the consequences of heat acting as a water pollutant?

Accepted Answer

A)  causes silting of waterways 
B)  reduces light reaching plants in water 
C)  increases the salinity and acidity of water 
D)  alters habitats and kinds of organisms present 
A)  causes silting of waterways 
B)  reduces light reaching plants in water 
C)  increases the salinity and acidity of water 
D)  alters habitats and kinds of organisms present

Question 17

Denitrification is

Accepted Answer

A)  a process by which nitrates are reduced to nitrous oxide or N₂ 
B)  a process by which nitrites are reduced to ammonia 
C)  a process by which amino acids are converted to pyruvate 
D)  largely due to aerobic environments 
A)  a process by which nitrates are reduced to nitrous oxide or N₂ 
B)  a process by which nitrites are reduced to ammonia 
C)  a process by which amino acids are converted to pyruvate 
D)  largely due to aerobic environments

Question 18

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 19

What results from the biological oxygen demand (BOD)being high and the water becoming anaerobic?

Accepted Answer

A)  a more efficient decomposition of wastes 
B)  increased need for sulfur 
C)  decreased need for carbon 
D)  accumulation of wastes 
A)  a more efficient decomposition of wastes 
B)  increased need for sulfur 
C)  decreased need for carbon 
D)  accumulation of wastes

Question 20

Which of the following statements about soil is false?

Accepted Answer

A)  anywhere in the soil you can find snottites 
B)  viruses can be used for biocontrol of insect pests in soil 
C)  humus is the nonliving organic matter in soil 
D)  carbon in the soil is continuously recycled 
A)  anywhere in the soil you can find snottites 
B)  viruses can be used for biocontrol of insect pests in soil 
C)  humus is the nonliving organic matter in soil 
D)  carbon in the soil is continuously recycled

Exam 25: Environmental Microbiology

The loss of water from pores of plant leaves is called

Producers obtain CO₂ from

The sulfur cycle is of special importance to

Nitrogen-fixing bacteria include

Molds in soil serve to

Nitrogen-fixing bacteria

The mechanism whereby Rhizobium and the legume associate is characterized by all of the following except

Which is the order of purification procedures for water?

Sulfate-reducing bacteria are characteristically

What is the meaning of biological oxygen demand (BOD)? Why is it important for pollution? What do microbes have to do with this?

The indicator organism for human pathogens in a water supply is

Some microbes can survive drought by forming

In testing for water purity,the presumptive test would include

The most predominant microbial group found in soil is

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

What are the consequences of heat acting as a water pollutant?

Denitrification is

Sulfur oxidation is carried out by

What results from the biological oxygen demand (BOD)being high and the water becoming anaerobic?

Which of the following statements about soil is false?

Scope and History of Microbiology

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

Immunology I: Basic Principles of Adaptive Immunity and Immunization

Immunolgy Ii: Immunological Disorders and Tests

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 Disease

Diseases of the Nervous System

Applied Microbiology

Filters