Question 1

Rates of cell production and cell death are approximately equal during the ________ phase of growth.

Accepted Answer

A)   lag
B)   log
C)   death
D)   stationary
E)   intermediate

Question 2

An aquatic microbe that can grow only near the surface of the water is probably which of the following?

Accepted Answer

A)   a phototroph
B)   a heterotroph
C)   a chemotroph
D)   a lithotroph
E)   an anaerobe

Question 3

Organisms that can grow with or without oxygen present are

Accepted Answer

A)   obligate aerobes.
B)   facultative anaerobes.
C)   aerotolerant anaerobes.
D)   obligate anaerobes.
E)   either facultative anaerobes or aerotolerant anaerobes.

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 phases.

Question 5

The events of binary fission are
I.the cell doubles in size
II.the DNA is replicated
III.the cell forms a septum
IV.the cell separates from its offspring
The correct order of these events is

Accepted Answer

A)   I, III, II, IV.
B)   II, III, I, IV.
C)   IV, I, III, II.
D)   II, I, III, IV.
E)   I, II, IV, III.

Question 6

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.

Question 7

Organisms that require organic sources of carbon and energy are called (chemoheterotrophs/chemoautotrophs/autotrophs).

Accepted Answer

The answer of Organisms that require organic sources of carbon...

Question 8

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 media

Question 9

Obligate anaerobes may be cultured in the laboratory

Accepted Answer

A)   in a reducing medium.
B)   in a standard incubator.
C)   in standard Petri plates.
D)   on blood agar plates.
E)   in standard complex media.

Question 10

The (maximum/optimum/selective)growth temperature is the temperature at which an organism exhibits the highest growth rate.

Accepted Answer

The answer of The (maximum/optimum/selective)growth temperature is the temperature at...

Question 11

A ________ is used in industrial microbiology to produce microbial products that are only synthesized during log phase growth.

Accepted Answer

A)   Coulter counter
B)   broth culture
C)   spectrophotometer
D)   pour plate
E)   chemostat

Question 12

Culturing of intracellular parasites generally requires (enrichment/cell culture/low oxygen)conditions.

Accepted Answer

The answer of Culturing of intracellular parasites generally requires (enrichment/cell...

Question 13

An epidemiologist is investigating a new disease and observes what appear to be bacteria inside tissue cells in clinical samples from victims.The scientist wants to try to isolate the bacteria in the lab.What culture conditions are most likely to be successful?

Accepted Answer

A)   culturing on blood agar plates
B)   inoculation of EMB plates
C)   incubation in an anaerobic culture system
D)   inoculation of cell cultures
E)   inoculation of a minimal medium broth

Question 14

The growth of bacterial cultures is best described as

Accepted Answer

A)   arithmetic growth.
B)   lag growth.
C)   logarithmic growth.
D)   cell division.
E)   replication.

Question 15

An organism that produces catalase enzyme is protected from the harmful effects of

Accepted Answer

A)   singlet oxygen (1O2) .
B)   hydroxyl radical (HO.) .
C)   peroxide anion (O22-) .
D)   superoxide radical (O2-) .
E)   molecular oxygen (O2) .

Exam 6: Microbial Nutrition and Growth

A ________ is used in industrial microbiology to produce microbial products that are only synthesized during log phase growth.

Correct Answer
verified

Rates of cell production and cell death are approximately equal during the ________ phase of growth.

Correct Answer
verified

The growth of bacterial cultures is best described as

Correct Answer
verified

Organisms that require organic sources of carbon and energy are called (chemoheterotrophs/chemoautotrophs/autotrophs).

Correct Answer
verified

Obligate anaerobes may be cultured in the laboratory

Correct Answer
verified

An organism that produces catalase enzyme is protected from the harmful effects of

Correct Answer
verified

The (maximum/optimum/selective)growth temperature is the temperature at which an organism exhibits the highest growth rate.

Correct Answer
verified

An aquatic microbe that can grow only near the surface of the water is probably which of the following?

Correct Answer
verified

The events of binary fission are I.the cell doubles in size II.the DNA is replicated III.the cell forms a septum IV.the cell separates from its offspring The correct order of these events is

Correct Answer
verified

Culturing of intracellular parasites generally requires (enrichment/cell culture/low oxygen)conditions.

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

An epidemiologist is investigating a new disease and observes what appear to be bacteria inside tissue cells in clinical samples from victims.The scientist wants to try to isolate the bacteria in the lab.What culture conditions are most likely to be successful?

Correct Answer
verified

Organisms that can grow with or without oxygen present are

Correct Answer
verified

Exam 6: Microbial Nutrition and Growth

A ________ is used in industrial microbiology to produce microbial products that are only synthesized during log phase growth.

Correct AnswerverifiedShow Answer

Rates of cell production and cell death are approximately equal during the ________ phase of growth.

Correct AnswerverifiedShow Answer

The growth of bacterial cultures is best described as

Correct AnswerverifiedShow Answer

Organisms that require organic sources of carbon and energy are called (chemoheterotrophs/chemoautotrophs/autotrophs).

Correct AnswerverifiedShow Answer

Obligate anaerobes may be cultured in the laboratory

Correct AnswerverifiedShow Answer

An organism that produces catalase enzyme is protected from the harmful effects of

Correct AnswerverifiedShow Answer

The (maximum/optimum/selective)growth temperature is the temperature at which an organism exhibits the highest growth rate.

Correct AnswerverifiedShow Answer

An aquatic microbe that can grow only near the surface of the water is probably which of the following?

Correct AnswerverifiedShow Answer

The events of binary fission are I.the cell doubles in size II.the DNA is replicated III.the cell forms a septum IV.the cell separates from its offspring The correct order of these events is

Correct AnswerverifiedShow Answer

Culturing of intracellular parasites generally requires (enrichment/cell culture/low oxygen)conditions.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

An epidemiologist is investigating a new disease and observes what appear to be bacteria inside tissue cells in clinical samples from victims.The scientist wants to try to isolate the bacteria in the lab.What culture conditions are most likely to be successful?

Correct AnswerverifiedShow Answer

Organisms that can grow with or without oxygen present are

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Correct Answer
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