Question 1

The primary producers in the ocean are:

Accepted Answer

A) prions 
B) viruses 
C) phytoplankton 
D) two of these choices 
A) prions 
B) viruses 
C) phytoplankton 
D) two of these choices

Question 2

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 3

Sulfate-reducing bacteria are characteristically _____.

Accepted Answer

A) strict anaerobes 
B) Desulfovibrio 
C) utilizing sulfate as a final electron acceptor 
D) all of these choices 
A) strict anaerobes 
B) Desulfovibrio 
C) utilizing sulfate as a final electron acceptor 
D) all of these choices

Question 4

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 5

Cytophaga,found in soil,is characterized by _____.

Accepted Answer

A) being a fungus 
B) cellulose degradation 
C) being strictly aerobic 
D) being a protozoan decomposer 
A) being a fungus 
B) cellulose degradation 
C) being strictly aerobic 
D) being a protozoan decomposer

Question 6

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 7

Eutrophication leads to:

Accepted Answer

A) a decrease in oxygen 
B) plants become very dense 
C) abundant nutrient enrichment 
D) all of these choices 
A) a decrease in oxygen 
B) plants become very dense 
C) abundant nutrient enrichment 
D) all of these choices

Question 8

Which term has been incorrectly matched?

Accepted Answer

A) biogeochemical cycles - recycling of life-essential elements and water 
B) nitrogenase - functional nitrogen-fixing enzyme 
C) swarmer cells - organisms that can invade waterlogged soils 
D) nitrate - form of nitrogen most usable in plant metabolism 
A) biogeochemical cycles - recycling of life-essential elements and water 
B) nitrogenase - functional nitrogen-fixing enzyme 
C) swarmer cells - organisms that can invade waterlogged soils 
D) nitrate - form of nitrogen most usable in plant metabolism

Question 9

During which step is an aeration tank used?

Accepted Answer

A) A 
B) B 
C) C 
D) D 
A) A 
B) B 
C) C 
D) D

Question 10

Nitrogen-fixing bacteria include:

Accepted Answer

A) cyanobacteria 
B) Clostridium 
C) Klebsiella 
D) all of these choices 
A) cyanobacteria 
B) Clostridium 
C) Klebsiella 
D) all of these choices

Question 11

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 12

Which bacteria are found in the desert and are oil eating?

Accepted Answer

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

Question 13

Which of the following microbes is not a producer in the environment?

Accepted Answer

A) photosynthetic bacteria 
B) heterotrophic bacteria 
C) cyanobacteria 
D) protista 
E) two of these choices 
A) photosynthetic bacteria 
B) heterotrophic bacteria 
C) cyanobacteria 
D) protista 
E) two of these choices

Question 14

Which of the following statements about extreme environments is incorrect?

Accepted Answer

A) Hydrothermal vents can reach temperatures up to 350° C. 
B) Hydrothermal fluids contain mixed communities of eubacteria and archaea. 
C) Bacteria that are involved in anaerobic oxidation of methane are rare in samples. 
D) In different zones of a chimney wall there are different communities of microbes. 
A) Hydrothermal vents can reach temperatures up to 350° C. 
B) Hydrothermal fluids contain mixed communities of eubacteria and archaea. 
C) Bacteria that are involved in anaerobic oxidation of methane are rare in samples. 
D) In different zones of a chimney wall there are different communities of microbes.

Question 15

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

Exam 25: Environmental Microbiology

The primary producers in the ocean are:

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

Sulfate-reducing bacteria are characteristically _____.

Soil contains human pathogens,for instance _____.

Cytophaga,found in soil,is characterized by _____.

In testing for water purity,the presumptive test would include:

Eutrophication leads to:

Which term has been incorrectly matched?

During which step is an aeration tank used?

Nitrogen-fixing bacteria include:

Which term is correctly matched with its definition?

Which bacteria are found in the desert and are oil eating?

Which of the following microbes is not a producer in the environment?

Which of the following statements about extreme environments is incorrect?

Nitrogen-fixing bacteria:

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

Immunology 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

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