Question 1

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)  synergism.F) A) and D)
G) A) and E)

Question 2

Bacteria living in a freshwater stream that are moved to salty seawater would

Accepted Answer

A)  now be in a hypotonic solution.
B)  gain water as a result of the move.
C)  now be in a isotonic solution.
D)  shrivel as a result of the move.E) A) and C)
F) A) and B)

Question 3

Which term refers to a nutrient that is required by a microorganism in large quantities for use in cell structure and metabolism?

Accepted Answer

A)  element
B)  macronutrient
C)  growth factor
D)  trace elementE) None of the above
F) B) and D)

Question 4

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

Accepted Answer

A) True 
 B)False

Question 5

An organism with a temperature growth range of 45°C to 60°C would be called

Accepted Answer

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

Question 6

Aerobic respiration is an example of

Accepted Answer

A)  photosynthesis.
B)  methanoheterotrophy.
C)  photoheterotrophy.
D)  chemoheterotrophy.
E)  photoautotrophy.F) B) and E)
G) B) and D)

Question 7

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 chlorideE) A) and B)
F) A) and C)

Question 8

The term autotroph 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) A) and B)
G) C) and E)

Question 9

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 source.F) B) and E)
G) A) and C)

Question 10

A Coulter counter can count viable cells as well as determine the size.

Accepted Answer

A) True 
 B)False

Question 11

The phase of the bacterial growth curve in which newly inoculated cells are adjusting to their new environment, metabolizing but not growing is the

Accepted Answer

A)  lag phase.
B)  log phase.
C)  stationary phase.
D)  death phase.
E)  prophase.F) B) and E)
G) B) and D)

Question 12

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 13

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

Accepted Answer

A) True 
 B)False

Question 14

An organism that can use gaseous oxygen in metabolism and has the enzymes to process toxic oxygen products is a(n)

Accepted Answer

A)  aerobe.
B)  obligate aerobe.
C)  facultative anaerobe.
D)  microaerophile.
E)  obligate anaerobe.F) A) and E)
G) D) and E)

Question 15

The movement of substances from lower to higher concentration across a semipermeable membrane that must have a specific protein carrier and cell expenditure of energy is called

Accepted Answer

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

Question 16

An organism that cannot tolerate any oxygen gas in its environment is a(n)

Accepted Answer

A)  aerobe.
B)  obligate aerobe.
C)  facultative anaerobe.
D)  microaerophile.
E)  obligate anaerobe.F) B) and E)
G) C) and D) E

Question 17

A closed culture system is used to determine a population growth curve.

Accepted Answer

A) True 
 B)False  True

Question 18

The term facultative refers to

Accepted Answer

A)  the ability to exist in a wide range of conditions.
B)  existing in a very narrow niche.
C)  using chemicals for energy production.
D)  using light for energy production.
E)  using oxygen for metabolism.F) A) and C)
G) A) and E)

Question 19

Anaerobes can be cultured in a CO2 rich environment, as long as O2 gas is excluded.

Accepted Answer

A) True 
 B)False

Question 20

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) A) and B)
G) B) and E)

Exam 7: Microbial Nutrition, Ecology, and Growth

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

Correct AnswerverifiedShow Answer

Bacteria living in a freshwater stream that are moved to salty seawater would

Correct AnswerverifiedShow Answer

Which term refers to a nutrient that is required by a microorganism in large quantities for use in cell structure and metabolism?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

An organism with a temperature growth range of 45°C to 60°C would be called

Correct AnswerverifiedB

Aerobic respiration is an example of

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The term autotroph refers to an organism that

Correct AnswerverifiedShow Answer

The term chemotroph refers to an organism that

Correct AnswerverifiedShow Answer

A Coulter counter can count viable cells as well as determine the size.

Correct AnswerverifiedShow Answer

The phase of the bacterial growth curve in which newly inoculated cells are adjusting to their new environment, metabolizing but not growing is the

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

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

Correct AnswerverifiedShow Answer

An organism that can use gaseous oxygen in metabolism and has the enzymes to process toxic oxygen products is a(n)

Correct AnswerverifiedShow Answer

The movement of substances from lower to higher concentration across a semipermeable membrane that must have a specific protein carrier and cell expenditure of energy is called

Correct AnswerverifiedShow Answer

An organism that cannot tolerate any oxygen gas in its environment is a(n)

Correct AnswerverifiedE

A closed culture system is used to determine a population growth curve.

Correct AnswerverifiedTrue

The term facultative refers to

Correct AnswerverifiedShow Answer

Anaerobes can be cultured in a CO2 rich environment, as long as O2 gas is excluded.

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

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B

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E

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True

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Anaerobes can be cultured in a CO₂ rich environment, as long as O₂ gas is excluded.

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