Question 1

Media containing some ingredients of unknown chemical composition are called __________ media.

Accepted Answer

A)   undefined
B)   complex
C)   defined
D)   syntheticE) C) and D)
F) B) and D)

Question 2

Organisms that can use carbon dioxide as their sole or principal source of carbon are

Accepted Answer

A)   auxotrophs.
B)   autotrophs.
C)   prototrophs.
D)   heterotrophs.E) B) and D)
F) All of the above

Question 3

__________ __________ are required organic compounds because they are essential cell components or precursors of such components that cannot be synthesized by the organism.

Accepted Answer

The answer of __________ __________ are required organic compounds because...

Question 4

Organisms that use reduced, preformed organic molecules as carbon sources are

Accepted Answer

A)   auxotrophs.
B)   autotrophs.
C)   prototrophs.
D)   heterotrophs.E) B) and D)
F) All of the above

Question 5

Mannitol salt agar (MSA)  only allows the growth of halophiles (salt-loving microbes) ; nonhalophiles will not grow. Among the halophiles, mannitol fermenters will produce acid that turns the pH indicator yellow; mannitol nonfermenters leave the medium red. Onto MSA you inoculate a halophilic mannitol fermenter and a halophilic mannitol nonfermenter. In this case, the medium is acting as (a)  __________ medium(s) .

Accepted Answer

A)   selective
B)   differential
C)   selective and differential
D)   enrichmentE) A) and D)
F) B) and D)

Question 6

Organisms that obtain energy from the oxidation of either organic or inorganic compounds are called

Accepted Answer

A)   chemotrophs.
B)   lithotrophs.
C)   organotrophs.
D)   phototrophs.E) B) and C)
F) All of the above

Question 7

Bacteria that can utilize methane, methanol, carbon monoxide, formic acid, and a few related one-carbon molecules as their principal source of carbon are called ____________.

Accepted Answer

A)   methylotrophic
B)   carbotrophic
C)   monotrophic
D)   autotrophicE) A) and C)
F) None of the above

Question 8

Which of the following is not considered a macronutrient?

Accepted Answer

A)   carbon (
C)  
B)   calcium (Ca) 
C)   potassium (K) 
D)   cobalt (Co) E) A) and B)
F) B) and C)

Question 9

Organisms usually have only a single transport system for any nutrient.

Accepted Answer

A) True 
 B)False

Question 10

Small organic molecules called __________ function as enzyme cofactors.

Accepted Answer

The answer of Small organic molecules called __________ function as...

Question 11

Many bacteria facilitate the uptake of iron by secreting low molecular weight molecules, called ___________, to form complexes with the iron that can then be readily transported into the cell.

Accepted Answer

The answer of Many bacteria facilitate the uptake of iron...

Question 12

The movement of molecules from an area of higher concentration to an area of lower concentration without the participation of specific carrier molecules is called

Accepted Answer

A)   facilitated diffusion.
B)   osmosis.
C)   passive diffusion.
D)   active transport.E) A) and B)
F) A) and C)

Question 13

Organisms that obtain energy from light are called

Accepted Answer

A)   chemotrophs.
B)   lithotrophs.
C)   organotrophs.
D)   phototrophs.E) B) and C)
F) A) and C)

Question 14

For surface cultivation of microorganisms, a sulfated polymer called agar can be extracted from __________ and added to liquid media in order to cause it to solidify.

Accepted Answer

A)   bacteria
B)   animal fat
C)   algae
D)   fungiE) B) and C)
F) A) and D)

Question 15

Which of the following is not a major class of growth factors?

Accepted Answer

A)   amino acids
B)   purines and pyrimidines
C)   vitamins
D)   nucleic acidsE) None of the above
F) C) and D)

Question 16

Nutrients can be concentrated from dilute solutions by

Accepted Answer

A)   pinocytosis.
B)   endocytosis.
C)   active transport and group translocation.
D)   electron transport.E) A) and D)
F) B) and C)

Question 17

Mannitol salt agar (MSA)  only allows the growth of halophiles (salt-loving microbes) . Among the halophiles, mannitol fermenters release acid that turns the pH indicator yellow; mannitol nonfermenters leave the medium red. Onto MSA you inoculate a halophilic mannitol nonfermenter and a nonhalophilic mannitol nonfermenter. Here the medium acts as a __________ medium.

Accepted Answer

A)   selective
B)   differential
C)   selective and differential
D)   enrichmentE) None of the above
F) All of the above

Question 18

Which of the following processes can be used to bring nutrients into a cell against a concentration gradient?

Accepted Answer

A)   active transport
B)   facilitated diffusion
C)   passive diffusion
D)   active transport and facilitated diffusionE) B) and D)
F) None of the above

Question 19

The movement of molecules across a membrane from an area of lower concentration to an area of higher concentration with the expenditure of energy is called

Accepted Answer

A)   facilitated diffusion.
B)   osmosis.
C)   passive diffusion.
D)   active transport.E) All of the above
F) A) and D)

Question 20

Colonies grow most rapidly at the __________ where oxygen and nutrients are readily available; however, they grow less rapidly at the __________ where these materials have been depleted.

Accepted Answer

The answer of Colonies grow most rapidly at the __________...

Exam 6: Microbial Nutrition

Nutrients can be concentrated from dilute solutions by

Correct Answer
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are required organic compounds because they are essential cell components or precursors of such components that cannot be synthesized by the organism.

Correct Answer
verified

For surface cultivation of microorganisms, a sulfated polymer called agar can be extracted from __________ and added to liquid media in order to cause it to solidify.

Correct Answer
verified

Which of the following is not considered a macronutrient?

Correct Answer
verified

Which of the following is not a major class of growth factors?

Correct Answer
verified

Which of the following processes can be used to bring nutrients into a cell against a concentration gradient?

Correct Answer
verified

Organisms that obtain energy from light are called

Correct Answer
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Organisms that obtain energy from the oxidation of either organic or inorganic compounds are called

Correct Answer
verified

Many bacteria facilitate the uptake of iron by secreting low molecular weight molecules, called ___________, to form complexes with the iron that can then be readily transported into the cell.

Correct Answer
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Bacteria that can utilize methane, methanol, carbon monoxide, formic acid, and a few related one-carbon molecules as their principal source of carbon are called ____________.

Correct Answer
verified

Organisms usually have only a single transport system for any nutrient.

Correct Answer
verified

Media containing some ingredients of unknown chemical composition are called __________ media.

Correct Answer
verified

Small organic molecules called __________ function as enzyme cofactors.

Correct Answer
verified

The movement of molecules from an area of higher concentration to an area of lower concentration without the participation of specific carrier molecules is called

Correct Answer
verified

Correct Answer
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Organisms that use reduced, preformed organic molecules as carbon sources are

Correct Answer
verified

Correct Answer
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The movement of molecules across a membrane from an area of lower concentration to an area of higher concentration with the expenditure of energy is called

Correct Answer
verified

Organisms that can use carbon dioxide as their sole or principal source of carbon are

Correct Answer
verified

Colonies grow most rapidly at the where oxygen and nutrients are readily available; however, they grow less rapidly at the where these materials have been depleted.

Correct Answer
verified

Exam 6: Microbial Nutrition

Nutrients can be concentrated from dilute solutions by

Correct AnswerverifiedShow Answer

__________ __________ are required organic compounds because they are essential cell components or precursors of such components that cannot be synthesized by the organism.

Correct AnswerverifiedShow Answer

For surface cultivation of microorganisms, a sulfated polymer called agar can be extracted from __________ and added to liquid media in order to cause it to solidify.

Correct AnswerverifiedShow Answer

Which of the following is not considered a macronutrient?

Correct AnswerverifiedShow Answer

Which of the following is not a major class of growth factors?

Correct AnswerverifiedShow Answer

Which of the following processes can be used to bring nutrients into a cell against a concentration gradient?

Correct AnswerverifiedShow Answer

Organisms that obtain energy from light are called

Correct AnswerverifiedShow Answer

Organisms that obtain energy from the oxidation of either organic or inorganic compounds are called

Correct AnswerverifiedShow Answer

Many bacteria facilitate the uptake of iron by secreting low molecular weight molecules, called ___________, to form complexes with the iron that can then be readily transported into the cell.

Correct AnswerverifiedShow Answer

Bacteria that can utilize methane, methanol, carbon monoxide, formic acid, and a few related one-carbon molecules as their principal source of carbon are called ____________.

Correct AnswerverifiedShow Answer

Organisms usually have only a single transport system for any nutrient.

Correct AnswerverifiedShow Answer

Media containing some ingredients of unknown chemical composition are called __________ media.

Correct AnswerverifiedShow Answer

Small organic molecules called __________ function as enzyme cofactors.

Correct AnswerverifiedShow Answer

The movement of molecules from an area of higher concentration to an area of lower concentration without the participation of specific carrier molecules is called

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Organisms that use reduced, preformed organic molecules as carbon sources are

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The movement of molecules across a membrane from an area of lower concentration to an area of higher concentration with the expenditure of energy is called

Correct AnswerverifiedShow Answer

Organisms that can use carbon dioxide as their sole or principal source of carbon are

Correct AnswerverifiedShow Answer

Colonies grow most rapidly at the __________ where oxygen and nutrients are readily available; however, they grow less rapidly at the __________ where these materials have been depleted.

Correct AnswerverifiedShow Answer

Correct Answer
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are required organic compounds because they are essential cell components or precursors of such components that cannot be synthesized by the organism.

Correct Answer
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Colonies grow most rapidly at the where oxygen and nutrients are readily available; however, they grow less rapidly at the where these materials have been depleted.

Correct Answer
verified