Question 1

The production of antibiotics is a form of amensalism called

Accepted Answer

A) symbiosis. 
B) satellitism. 
C) antibiosis. 
D) mutualism. 
E) synergism. 
A) symbiosis. 
B) satellitism. 
C) antibiosis. 
D) mutualism. 
E) synergism.

Question 2

The term obligate refers to

Accepted Answer

A) the ability to exist in a wide range of conditions. 
B) existing in a very narrow niche. 
C) using chemicals for energy production. 
D) using light for energy production. 
E) using oxygen for metabolism. 
A) the ability to exist in a wide range of conditions. 
B) existing in a very narrow niche. 
C) using chemicals for energy production. 
D) using light for energy production. 
E) using oxygen for metabolism.

Question 3

An organism that grows slowly in the cold but has an optimum growth temperature of 32°C is called

Accepted Answer

A) an extremophile. 
B) a thermophile. 
C) a psychrophile. 
D) a facultative psychrophile. 
E) thermoduric. 
A) an extremophile. 
B) a thermophile. 
C) a psychrophile. 
D) a facultative psychrophile. 
E) thermoduric.

Question 4

Archaea as a group are not pathogens.This is because

Accepted Answer

A) they evolved without mammals. 
B) mammals evolved special defenses against them. 
C) mammalian hosts do not meet their environmental requirements. 
D) they are out-competed by natural flora. 
A) they evolved without mammals. 
B) mammals evolved special defenses against them. 
C) mammalian hosts do not meet their environmental requirements. 
D) they are out-competed by natural flora.

Question 5

The The E. coli that normally live in the human large intestines and produce vitamin K that the body uses would be best termed a _____ relationship.

Accepted Answer

A) parasitic 
B) saprobic 
C) commensal 
D) mutualistic 
A) parasitic 
B) saprobic 
C) commensal 
D) mutualistic

Question 6

Whether an organism is a phototroph or a chemotroph depends on its source of energy.

Accepted Answer

A) True 
 B)False

Question 7

Organisms that feed on dead organisms for nutrients are called

Accepted Answer

A) saprobes. 
B) parasites. 
C) autotrophs. 
D) lithoautotrophs. 
E) phototrophs. 
A) saprobes. 
B) parasites. 
C) autotrophs. 
D) lithoautotrophs. 
E) phototrophs.

Question 8

Why do bacterial cells require calcium?

Accepted Answer

A) It stabilizes the cell wall. 
B) It stabilizes the ribosomes. 
C) It stabilizes the nucleoid. 
D) It maintains cellular pH. 
E) It makes strong bones. 
A) It stabilizes the cell wall. 
B) It stabilizes the ribosomes. 
C) It stabilizes the nucleoid. 
D) It maintains cellular pH. 
E) It makes strong bones.

Question 9

The movement of substances from higher to lower concentration across a semipermeable membrane that must have a specific protein carrier but no energy expenditure is called

Accepted Answer

A) facilitated diffusion. 
B) diffusion. 
C) active transport. 
D) osmosis. 
E) endocytosis. 
A) facilitated diffusion. 
B) diffusion. 
C) active transport. 
D) osmosis. 
E) endocytosis.

Question 10

An organism that can exist in both oxygen and oxygen-free environments is a(n)

Accepted Answer

A) aerobe. 
B) obligate aerobe. 
C) facultative anaerobe. 
D) microaerophile. 
E) obligate anaerobe. 
A) aerobe. 
B) obligate aerobe. 
C) facultative anaerobe. 
D) microaerophile. 
E) obligate anaerobe.

Question 11

Lithoautotrophs use inorganic nutrients for carbon and energy sources.

Accepted Answer

A) True 
 B)False

Question 12

Which term refers to the diffusion of water through a semipermeable membrane?

Accepted Answer

A) facilitated diffusion 
B) diffusion 
C) active transport 
D) osmosis 
E) endocytosis 
A) facilitated diffusion 
B) diffusion 
C) active transport 
D) osmosis 
E) endocytosis

Question 13

Obligate saprobes can adapt to a living host.

Accepted Answer

A) True 
 B)False

Question 14

An organism that cannot grow without oxygen is a(n)

Accepted Answer

A) aerobe. 
B) obligate aerobe. 
C) facultative anaerobe. 
D) microaerophile. 
E) obligate anaerobe. 
A) aerobe. 
B) obligate aerobe. 
C) facultative anaerobe. 
D) microaerophile. 
E) obligate anaerobe.

Question 15

Planktonic bacteria are more susceptible to antibiotics as compared to biofilm microorganisms.

Accepted Answer

A) True 
 B)False

Question 16

The majority of microbes live and grow in habitats between pH 7 and 9.

Accepted Answer

A) True 
 B)False

Question 17

The phase of the bacterial growth curve that shows the maximum rate of cell division is the

Accepted Answer

A) lag phase. 
B) log phase. 
C) stationary phase. 
D) death phase. 
E) prophase. 
A) lag phase. 
B) log phase. 
C) stationary phase. 
D) death phase. 
E) prophase.

Question 18

Bacteria have an average generation time of 24 hours.

Accepted Answer

A) True 
 B)False

Question 19

Which two enzymes catalyze the steps converting the toxic superoxide ion to less harmful oxygen gas?

Accepted Answer

A) catalase and hydrogen peroxidases 
B) superoxide dismutase and hydrogen peroxidase 
C) superoxide dismutase and catalase 
D) catalase and oxidase 
E) superoxide dismutase and oxidase 
A) catalase and hydrogen peroxidases 
B) superoxide dismutase and hydrogen peroxidase 
C) superoxide dismutase and catalase 
D) catalase and oxidase 
E) superoxide dismutase and oxidase

Question 20

Which term describes human pathogens?

Accepted Answer

A) psychrophiles 
B) thermophiles 
C) halophiles 
D) mesophiles 
E) acidophiles 
A) psychrophiles 
B) thermophiles 
C) halophiles 
D) mesophiles 
E) acidophiles

Exam 7: Microbial Nutrition, Ecology, and Growth

The production of antibiotics is a form of amensalism called

The term obligate refers to

An organism that grows slowly in the cold but has an optimum growth temperature of 32°C is called

Archaea as a group are not pathogens.This is because

The The E. coli that normally live in the human large intestines and produce vitamin K that the body uses would be best termed a _____ relationship.

Whether an organism is a phototroph or a chemotroph depends on its source of energy.

Organisms that feed on dead organisms for nutrients are called

Why do bacterial cells require calcium?

The movement of substances from higher to lower concentration across a semipermeable membrane that must have a specific protein carrier but no energy expenditure is called

An organism that can exist in both oxygen and oxygen-free environments is a(n)

Lithoautotrophs use inorganic nutrients for carbon and energy sources.

Which term refers to the diffusion of water through a semipermeable membrane?

Obligate saprobes can adapt to a living host.

An organism that cannot grow without oxygen is a(n)

Planktonic bacteria are more susceptible to antibiotics as compared to biofilm microorganisms.

The majority of microbes live and grow in habitats between pH 7 and 9.

The phase of the bacterial growth curve that shows the maximum rate of cell division is the

Bacteria have an average generation time of 24 hours.

Which two enzymes catalyze the steps converting the toxic superoxide ion to less harmful oxygen gas?

Which term describes human pathogens?

The Main Themes of Microbiology

The Chemistry of Biology

Tools of the Laboratory: Methods of Studying Microorganisms

A Survey of Prokaryotic Cells and Microorganisms

A Survey of Eukaryotic Cells and Microorganisms

An Introduction to Viruses

An Introduction to Microbial Metabolism: the Chemical Crossroads of Life

Microbial Genetics

Genetic Engineering: a Revolution in Molecular Biology

Physical and Chemical Agents for Microbial Control

Drugs, Microbes, Host--The Elements of Chemotherapy

Microbe-Human Interactions: Infection and Disease

An Introduction to Host Defenses and Innate Immunities

Adaptive, Specific Immunity and Immunization

Disorders in Immunity

Procedures for Identifying Pathogens and Diagnosing Infections

The Gram-Positive and Gram-Negative Cocci of Medical Importance

The Gram-Positive Bacilli of Medical Importance

The Gram-Negative Bacilli of Medical Importance

Miscellaneous Bacterial Agents of Disease

The Fungi of Medical Importance

The Parasites of Medical Importance

Introduction to Viruses That Infect Humans: the Dna Viruses

The Rna Viruses That Infect Humans

Environmental Microbiology

Applied and Industrial Microbiology

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