Question 1

Bacterial biofilms stimulate the immune system differently than planktonic bacteria.

Accepted Answer

A) True 
 B)False

Question 2

Bacteria have an average generation time of 24 hours.

Accepted Answer

A) True 
 B)False

Question 3

All of the following could find a location in or on body tissues suitable for growth except

Accepted Answer

A)  Psychrophiles
B)  Anaerobes
C)  Facultative anaerobes
D)  Mesophiles
E)  CapnophilesF) A) and E)
G) B) and D)

Question 4

What type of media is used to demonstrate oxygen requirements of microbes?

Accepted Answer

A)  Blood agar
B)  Thioglycollate
C)  Sulfite polymyxin sulfadiazine
D)  Sodium chloride
E)  None of the choices is correctF) All of the above
G) B) and E)

Question 5

Mediated transport of polar molecules and ions across the plasma membrane utilizes a _____ _____ that will bind to the substance effecting a conformational change that allows movement across the membrane.

Accepted Answer

A)  Protein carrier
B)  Lipid carrier
C)  Porin carrier
D)  Enzyme carrier
E)  All of the choices are correctF) B) and E)
G) D) and E)

Question 6

In the viable plate count method, a measured sample of a culture is evenly spread across an agar surface and incubated.Each _____ represents one _____ from the sample.

Accepted Answer

A)  Cell, cell
B)  Cell, colony
C)  Colony, cell
D)  Species, colony
E)  Generation, cellF) A) and B)
G) D) and E)

Question 7

The time that it takes for a freshly inoculated agar culture to develop visible colonies is principally governed by that species' generation time.

Accepted Answer

A) True 
 B)False

Question 8

An organism with a temperature growth range of 45 ∘\circ∘  C to 60 ∘\circ∘  C would be called a(n)

Accepted Answer

A)  Extremophile
B)  Thermophile
C)  Psychrophile
D)  Facultative psychrophile
E)  Thermoduric F) B) and D)
G) B) and E)

Question 9

Which of the following is not a major element of a microbial cell?

Accepted Answer

A)  Copper
B)  Carbon
C)  Hydrogen
D)  Nitrogen
E)  OxygenF) A) and B)
G) C) and D)

Question 10

The time interval from parent cell to two new daughter cells is called the

Accepted Answer

A)  Binary fission
B)  Growth curve
C)  Generation time
D)  Death phase
E)  Culture timeF) A) and E)
G) A) and D)

Question 11

Calcium is required for bacteria because

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 bonesF) B) and D)
G) A) and D)

Question 12

An organism that grows slowly in the cold but has an optimum growth temperature of 32 ∘\circ∘  C is called a(n)

Accepted Answer

A)  Extremophile
B)  Thermophile
C)  Psychrophile
D)  Facultative psychrophile
E)  Thermoduric F) C) and E)
G) A) and D)

Question 13

Cultures of a bacterial species were incubated out on the incubator shelf, in an anaerobic jar and in a candle jar.After incubation there was moderate growth of cultures in the candle and anaerobic jars, but heavy growth of the culture on the incubator shelf.This species is a/an

Accepted Answer

A)  Aerobe
B)  Anaerobe
C)  Facultative anaerobe
D)  Microaerophile
E)  CapnophileF) C) and E)
G) A) and B)

Question 14

Which of the following require the cell to use ATP?

Accepted Answer

A)  Facilitated diffusion
B)  Diffusion
C)  Endocytosis
D)  Osmosis
E)  None of the choices are correctF) B) and D)
G) B) and C)

Question 15

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

Accepted Answer

A) True 
 B)False

Question 16

Organisms called _____ live on or in the body of a host and cause some degree of harm.

Accepted Answer

A)  Mesophiles
B)  Thermophiles
C)  Commensals
D)  Pathogens
E)  HalophilesF) None of the above
G) B) and D)

Question 17

A barophile would grow best in

Accepted Answer

A)  Acid pools
B)  Deep oceans
C)  Hot geyser springs
D)  Arid, desert soil
E)  Salt lakesF) C) and D)
G) B) and D)

Question 18

The type of photosynthesis that does not produce oxygen

Accepted Answer

A)  Occurs in cyanobacteria
B)  Does not require CO2 as a reactant
C)  Occurs in purple and green sulfur bacteria
D)  Does not require sunlight
E)  Occurs in algae and plantsF) C) and D)
G) A) and B)

Question 19

The term chemotroph refers to an organism that

Accepted Answer

A)  Uses CO2 for its carbon source
B)  Must obtain organic compounds for its carbon needs
C)  Gets energy from sunlight
D)  Gets energy by oxidizing chemical compounds
E)  Does not need a carbon sourceF) C) and E)
G) A) and D)

Question 20

A change in one partner in a close relationship that leads to a change in the other partner is

Accepted Answer

A)  Symbiosis
B)  Coevolution
C)  Antibiosis
D)  Mutualism
E)  SynergismF) All of the above
G) C) and D)

Exam 7: Microbial Nutrition, Ecology, and Growth

An organism with a temperature growth range of 45 ∘\circ∘ C to 60 ∘\circ∘ C would be called a(n)

Correct AnswerverifiedShow Answer

Bacterial biofilms stimulate the immune system differently than planktonic bacteria.

Correct AnswerverifiedShow Answer

All of the following could find a location in or on body tissues suitable for growth except

Correct AnswerverifiedShow Answer

The time interval from parent cell to two new daughter cells is called the

Correct AnswerverifiedShow Answer

Bacteria have an average generation time of 24 hours.

Correct AnswerverifiedShow Answer

A change in one partner in a close relationship that leads to a change in the other partner is

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Cultures of a bacterial species were incubated out on the incubator shelf, in an anaerobic jar and in a candle jar.After incubation there was moderate growth of cultures in the candle and anaerobic jars, but heavy growth of the culture on the incubator shelf.This species is a/an

Correct AnswerverifiedShow Answer

The type of photosynthesis that does not produce oxygen

Correct AnswerverifiedShow Answer

Mediated transport of polar molecules and ions across the plasma membrane utilizes a _____ _____ that will bind to the substance effecting a conformational change that allows movement across the membrane.

Correct AnswerverifiedShow Answer

What type of media is used to demonstrate oxygen requirements of microbes?

Correct AnswerverifiedShow Answer

The term chemotroph refers to an organism that

Correct AnswerverifiedShow Answer

The time that it takes for a freshly inoculated agar culture to develop visible colonies is principally governed by that species' generation time.

Correct AnswerverifiedShow Answer

An organism that grows slowly in the cold but has an optimum growth temperature of 32 ∘\circ∘ C is called a(n)

Correct AnswerverifiedShow Answer

Which of the following require the cell to use ATP?

Correct AnswerverifiedShow Answer

A barophile would grow best in

Correct AnswerverifiedShow Answer

Organisms called _____ live on or in the body of a host and cause some degree of harm.

Correct AnswerverifiedShow Answer

Which of the following is not a major element of a microbial cell?

Correct AnswerverifiedShow Answer

In the viable plate count method, a measured sample of a culture is evenly spread across an agar surface and incubated.Each _____ represents one _____ from the sample.

Correct AnswerverifiedShow Answer

Calcium is required for bacteria because

Correct AnswerverifiedShow Answer

An organism with a temperature growth range of 45^$\circ$ C to 60^$\circ$ C would be called a(n)

Correct Answer
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Mediated transport of polar molecules and ions across the plasma membrane utilizes a _ _ that will bind to the substance effecting a conformational change that allows movement across the membrane.

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
verified

An organism that grows slowly in the cold but has an optimum growth temperature of 32^$\circ$ C is called a(n)

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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In the viable plate count method, a measured sample of a culture is evenly spread across an agar surface and incubated.Each _ represents one _ from the sample.

Correct Answer
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Correct Answer
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