Question 1

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 2

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 B

Question 3

The trickling filtration system employs a bed of rocks that have been coated with:

Accepted Answer

A) Sphaerotilus 
B) Pseudomonas 
C) Beggiatoa 
D) two of these choices 
A) Sphaerotilus 
B) Pseudomonas 
C) Beggiatoa 
D) two of these choices D

Question 4

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 5

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

Question 6

Some microbes can survive drought by forming _____.

Accepted Answer

A) fimbriae 
B) spores 
C) cysts 
D) two of these choices 
A) fimbriae 
B) spores 
C) cysts 
D) two of these choices

Question 7

How do the ONPG and MUG test detect microorganisms in water?

Accepted Answer

A) color is changed by enzymes secreted by coliform bacteria 
B) gas production in cultures of lactose broth 
C) observing dark colonies of coliform organisms on EMB-lactose agar 
D) colonies forming on surface of a sterile absorbent pad 
A) color is changed by enzymes secreted by coliform bacteria 
B) gas production in cultures of lactose broth 
C) observing dark colonies of coliform organisms on EMB-lactose agar 
D) colonies forming on surface of a sterile absorbent pad

Question 8

Which step produces drinkable water?

Accepted Answer

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

Question 9

Most denitrification is due to _____.

Accepted Answer

A) Rhizobium 
B) Azotobacter 
C) Pseudomonas 
D) Nitrosomonas 
A) Rhizobium 
B) Azotobacter 
C) Pseudomonas 
D) Nitrosomonas

Question 10

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

Question 11

Which of the following statements about ecology is incorrect?

Accepted Answer

A) The biosphere consists of three layers- the hydrosphere, lithosphere and atmosphere. 
B) Communities with many populations of organisms are more stable than those with fewer populations. 
C) Vegetative cells must have water. 
D) The sun is the ultimate source of energy for all organisms in any ecosystem. 
A) The biosphere consists of three layers- the hydrosphere, lithosphere and atmosphere. 
B) Communities with many populations of organisms are more stable than those with fewer populations. 
C) Vegetative cells must have water. 
D) The sun is the ultimate source of energy for all organisms in any ecosystem.

Question 12

Nitrogen stripping occurs during _____.

Accepted Answer

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

Question 13

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) sulfuric acid 
D) sulfate 
A) hydrogen sulfate 
B) hydrogen sulfide 
C) sulfuric acid 
D) sulfate

Question 14

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 15

Nitrification is characterized by all of the following except:

Accepted Answer

A) carried out by autotrophic bacteria 
B) supplies plants with a usable nitrogen source 
C) produces ammonia 
D) nitrogen is oxidized in both of the two steps 
A) carried out by autotrophic bacteria 
B) supplies plants with a usable nitrogen source 
C) produces ammonia 
D) nitrogen is oxidized in both of the two steps

Question 16

The loss of water from pores of plant leaves is called:

Accepted Answer

A) transpiration 
B) respiration 
C) evaporation 
D) two of these choices 
A) transpiration 
B) respiration 
C) evaporation 
D) two of these choices

Question 17

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

Accepted Answer

Biological oxygen demand (BOD) is a meas

Question 18

Tertiary treatment of sewage could include:

Accepted Answer

A) chlorine 
B) UV light 
C) ozone 
D) all of these choices 
A) chlorine 
B) UV light 
C) ozone 
D) all of these choices

Question 19

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 20

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) death of most members of any ecosystem 
A) a more efficient decomposition of wastes 
B) increased need for sulfur 
C) decreased need for carbon 
D) death of most members of any ecosystem

Exam 25: Environmental Microbiology

Producers obtain CO₂ from _____.

The most predominant microbial group found in soil is:

The trickling filtration system employs a bed of rocks that have been coated with:

Which is the order of purification procedures for water?

A niche includes all of the following except:

Some microbes can survive drought by forming _____.

How do the ONPG and MUG test detect microorganisms in water?

Which step produces drinkable water?

Most denitrification is due to _____.

Which of the following statements about soil is false?

Which of the following statements about ecology is incorrect?

Nitrogen stripping occurs during _____.

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

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

Nitrification is characterized by all of the following except:

The loss of water from pores of plant leaves is called:

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

Tertiary treatment of sewage could include:

Which of the following statements about biogeochemical cycles is true?

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

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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