Question 1

Obligate anaerobes have enzymes such as superoxide dismutase to protect them from the damaging effects of oxygen.

Accepted Answer

A) True 
 B)False

Question 2

A(n) __________ can measure changes in the turbidity of a bacterial culture.

Accepted Answer

spectrophotometer

Question 3

Thermoduric mesophiles are often responsible for spoilage of improperly canned foods.

Accepted Answer

A) True 
 B)False

Question 4

During which growth phase are bacteria more susceptible to antimicrobial drugs?

Accepted Answer

A)   lag phase
B)   log phase
C)   stationary phase
D)   death phase
E)   the susceptibility is the same for all phasesF) B) and D)
G) A) and B)

Question 5

All of the following are used to protect organisms from the toxic by-products of oxygen EXCEPT

Accepted Answer

A)   carotenoids.
B)   superoxide dismutase.
C)   peroxidase.
D)   protease.
E)   catalase.F) C) and D)
G) A) and C)

Question 6

A clinical sample labeled as "sputum" was collected from

Accepted Answer

A)   the skin.
B)   the blood.
C)   the central nervous system.
D)   a piece of tissue.
E)   the lungs.F) B) and D)
G) B) and C) E

Question 7

Another term for the logarithmic growth of bacterial cells is

Accepted Answer

A)   generation time.
B)   exponential growth.
C)   arithmetic growth.
D)   absorbance.
E)   binary fission.F) B) and D)
G) B) and C)

Question 8

Quorum sensing is a process by which bacteria respond to the density of other bacteria in their environment.

Accepted Answer

A) True 
 B)False

Question 9

Human pathogens are classified as

Accepted Answer

A)   thermoduric.
B)   thermophiles.
C)   mesophiles.
D)   hyperthermophiles.
E)   psychrophiles.F) A) and C)
G) D) and E)

Question 10

A sample placed into fresh medium is typically initially in the __________ phase of microbial growth.

Accepted Answer

lag

Question 11

A(n) __________ is a sample of microorganisms introduced into a growth medium.

Accepted Answer

The answer of A(n) __________ is a sample of microorganisms...

Question 12

In microbiology, the term growth usually refers to an increase in

Accepted Answer

A)   a microbe's size.
B)   the number of microbial cells.
C)   the amount of ATP produced.
D)   the number and size of microbial cells.
E)   the number and size of microbial cells and the amount of ATP produced.F) A) and B)
G) None of the above

Question 13

The conversion of nitrogen gas to ammonia is called nitrogen __________.

Accepted Answer

The answer of The conversion of nitrogen gas to ammonia...

Question 14

Bacteria that thrive at human body temperatures are classified as __________.

Accepted Answer

The answer of Bacteria that thrive at human body temperatures...

Question 15

A fastidious organism might be grown on which of the following types of media?

Accepted Answer

A)   transport media
B)   reducing media
C)   enriched media
D)   differential media
E)   selective mediaF) B) and C)
G) D) and E)

Question 16

A film of cells at the surface of a broth is called a(n) __________.

Accepted Answer

The answer of A film of cells at the surface...

Question 17

Explain how aerobic organisms tolerate the presence of oxygen in their metabolic pathways despite its toxic properties.

Accepted Answer

Oxygen is toxic to organisms only becaus...

Question 18

Obligate anaerobes may be cultured in the laboratory

Accepted Answer

A)   in a reducing medium.
B)   in a candle jar.
C)   in standard Petri plates.
D)   on blood agar plates.
E)   on blood agar plates in a candle jar.F) C) and D)
G) A) and B)

Question 19

Nitrogen fixation is a process that occurs in all bacteria.

Accepted Answer

A) True 
 B)False

Question 20

The __________ growth temperature is the temperature at which an organism exhibits the highest growth rate.

Accepted Answer

The answer of The __________ growth temperature is the temperature...

Exam 6: Microbial Nutrition and Growth

Obligate anaerobes have enzymes such as superoxide dismutase to protect them from the damaging effects of oxygen.

Correct AnswerverifiedShow Answer

A(n) __________ can measure changes in the turbidity of a bacterial culture.

Correct Answerverifiedspectrophotometer

Thermoduric mesophiles are often responsible for spoilage of improperly canned foods.

Correct AnswerverifiedShow Answer

During which growth phase are bacteria more susceptible to antimicrobial drugs?

Correct AnswerverifiedShow Answer

All of the following are used to protect organisms from the toxic by-products of oxygen EXCEPT

Correct AnswerverifiedShow Answer

A clinical sample labeled as "sputum" was collected from

Correct AnswerverifiedE

Another term for the logarithmic growth of bacterial cells is

Correct AnswerverifiedShow Answer

Quorum sensing is a process by which bacteria respond to the density of other bacteria in their environment.

Correct AnswerverifiedShow Answer

Human pathogens are classified as

Correct AnswerverifiedShow Answer

A sample placed into fresh medium is typically initially in the __________ phase of microbial growth.

Correct Answerverifiedlag

A(n) __________ is a sample of microorganisms introduced into a growth medium.

Correct AnswerverifiedShow Answer

In microbiology, the term growth usually refers to an increase in

Correct AnswerverifiedShow Answer

The conversion of nitrogen gas to ammonia is called nitrogen __________.

Correct AnswerverifiedShow Answer

Bacteria that thrive at human body temperatures are classified as __________.

Correct AnswerverifiedShow Answer

A fastidious organism might be grown on which of the following types of media?

Correct AnswerverifiedShow Answer

A film of cells at the surface of a broth is called a(n) __________.

Correct AnswerverifiedShow Answer

Explain how aerobic organisms tolerate the presence of oxygen in their metabolic pathways despite its toxic properties.

Correct AnswerverifiedOxygen is toxic to organisms only becaus...View AnswerShow Answer

Obligate anaerobes may be cultured in the laboratory

Correct AnswerverifiedShow Answer

Nitrogen fixation is a process that occurs in all bacteria.

Correct AnswerverifiedShow Answer

The __________ growth temperature is the temperature at which an organism exhibits the highest growth rate.

Correct AnswerverifiedShow Answer

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spectrophotometer

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E

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lag

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Oxygen is toxic to organisms only becaus...
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