Question 1

The term heterotroph 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 source.F) C) and D)
G) A) and D)

Question 2

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

The answer of Mediated transport of polar molecules and ions...

Question 3

A microorganism that has an optimum growth temperature of 37°C but can survive short exposure to high temperatures is called a/an:

Accepted Answer

A)  extremophile.
B)  thermophile.
C)  psychrophile.
D)  facultative psychrophile.
E)  thermoduric.F) D) and E)
G) B) and E)

Question 4

Facilitated diffusion and active transport require a carrier protein to mediate the movement across the plasma membrane.

Accepted Answer

A) True 
 B)False

Question 5

Microorganisms require small quantities of this nutrient for enzyme function and maintenance of protein structure:

Accepted Answer

A)  element
B)  macronutrient
C)  water
D)  growth factor
E)  trace elementF) A) and B)
G) A) and C)

Question 6

The methanogens, producers of methane gas, require environments that:

Accepted Answer

A)  have sunlight.
B)  are very acidic.
C)  have abundant oxygen and CO2.
D)  are extremely cold.
E)  are anaerobic with hydrogen gas and CO2.F) A) and C)
G) C) and D)

Question 7

Facultative anaerobes usually possess:

Accepted Answer

A)  catalase only.
B)  superoxide dismutase only.
C)  both catalase and superoxide dismutase.
D)  neither catalase or superoxide dismutase.
E)  alternative mechanisms for dealing with oxygen.F) A) and E)
G) C) and D)

Question 8

Microorganisms that live in severe habitats, such as very hot, acidic, or salty environments, are called _____.

Accepted Answer

The answer of Microorganisms that live in severe habitats, such...

Question 9

Lithoautotrophs use inorganic nutrients for carbon and energy sources.

Accepted Answer

A) True 
 B)False

Question 10

When bacteria that are living in a freshwater stream moved to seawater, then what would happen?

Accepted Answer

A)  It would be in a hypotonic solution.
B)  It would gain water.
C)  It would be in a isotonic solution.
D)  It would shrivel.
E)  None of the choices mentioned above are correct.F) A) and B)
G) A) and C)

Question 11

The degree of turbidity in a culture correlates to the amount of cell growth.

Accepted Answer

A) True 
 B)False

Question 12

Which of the following choice is true in case of a microaerophile?

Accepted Answer

A)  It grows best in an anaerobic jar.
B)  It grows with or without oxygen.
C)  It needs normal atmospheric levels of oxygen.
D)  It requires a small amount of oxygen but won't grow at normal atmospheric levels.
E)  None of the choices are correct.F) B) and D)
G) B) and C)

Question 13

Which of the following methods of enumerating cells is the only one to detect live cells?

Accepted Answer

A)  direct microscopic count
B)  viable plate count
C)  turbidity
D)  coulter counter
E)  flow cytometerF) A) and D)
G) B) and C)

Question 14

Barophiles are microorganisms able to tolerate:

Accepted Answer

A)  a pH of 1 to 2.
B)  high solute concentration.
C)  high atmospheric pressure.
D)  high osmotic pressure.
E)  intense ultraviolet light.F) B) and E)
G) C) and D)

Question 15

Saprobes do not need a carbon source for growth and metabolism.

Accepted Answer

A) True 
 B)False

Question 16

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 correct.F) A) and E)
G) None of the above

Question 17

When whole cells or large molecules in solution are engulfed by a cell, this endocytosis is specifically termed _____.

Accepted Answer

The answer of When whole cells or large molecules in...

Question 18

Transverse binary fission results in 4 daughter cells from 1 parent cell.

Accepted Answer

A) True 
 B)False

Question 19

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)  capnophile.F) B) and E)
G) A) and E)

Question 20

Microorganisms require large quantities of this nutrient for use in cell structure and metabolism:

Accepted Answer

A)  element
B)  macronutrient
C)  water
D)  growth factor
E)  trace elementF) A) and B)
G) A) and C)

Exam 7: Microbial Nutrition, Ecology, and Growth

Facultative anaerobes usually possess:

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Which of the following methods of enumerating cells is the only one to detect live cells?

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A microorganism that has an optimum growth temperature of 37°C but can survive short exposure to high temperatures is called a/an:

Correct AnswerverifiedShow Answer

Facilitated diffusion and active transport require a carrier protein to mediate the movement across the plasma membrane.

Correct AnswerverifiedShow Answer

Microorganisms require large quantities of this nutrient for use in cell structure and metabolism:

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Saprobes do not need a carbon source for growth and metabolism.

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Lithoautotrophs use inorganic nutrients for carbon and energy sources.

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The term heterotroph refers to an organism that:

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Transverse binary fission results in 4 daughter cells from 1 parent cell.

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Which of the following choice is true in case of a microaerophile?

Correct AnswerverifiedShow Answer

Which of the following require the cell to use ATP?

Correct AnswerverifiedShow Answer

When bacteria that are living in a freshwater stream moved to seawater, then what would happen?

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 methanogens, producers of methane gas, require environments that:

Correct AnswerverifiedShow Answer

The degree of turbidity in a culture correlates to the amount of cell growth.

Correct AnswerverifiedShow Answer

When whole cells or large molecules in solution are engulfed by a cell, this endocytosis is specifically termed _____.

Correct AnswerverifiedShow Answer

Barophiles are microorganisms able to tolerate:

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

Microorganisms require small quantities of this nutrient for enzyme function and maintenance of protein structure:

Correct AnswerverifiedShow Answer

Microorganisms that live in severe habitats, such as very hot, acidic, or salty environments, are called _____.

Correct AnswerverifiedShow 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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