Question 1

The movement of molecules from an area of high concentration to an area of lower concentration is called

Accepted Answer

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

Question 2

Cultures of a bacterial species were incubated on the shelf of a refrigerator, out on a lab bench top, on the shelf of a 37°C incubator and on the shelf of a 50°C incubator.After incubation, there was no growth at 37°C and 50°C, slight growth out on the bench top and abundant growth at refrigeration.What term could be used for this species?

Accepted Answer

A)  Halophile
B)  Mesophile
C)  Anaerobe
D)  Psychrophile
E)  CapnophileF) A) and B)
G) A) and C)

Question 3

An organism that uses CO2 for its carbon needs and sunlight for its energy needs would be called a/an

Accepted Answer

A)  heterotroph.
B)  photoautotroph.
C)  chemoheterotroph.
D)  saprobe.
E)  halotroph.F) B) and D)
G) D) and E)

Question 4

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 time.F) A) and E)
G) C) and D)

Question 5

The direct cell count, using a flow cytometer, can determine both viable cell numbers and number of dead cells in the sample.

Accepted Answer

A) True 
 B)False

Question 6

Growth factors

Accepted Answer

A)  are inorganic.
B)  are synthesized by the organism.
C)  contain elemental oxygen.
D)  cannot be synthesized by the organism.
E)  All of these choices are correct.F) A) and D)
G) A) and C)

Question 7

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)  capnophiles.F) B) and E)
G) B) and D)

Question 8

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

Accepted Answer

A)  thermophiles.
B)  halophiles.
C)  psychrophiles.
D)  extremophiles.
E)  barophiles.F) C) and D)
G) B) and D)

Question 9

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

Question 10

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

Accepted Answer

A)  cell; cell
B)  cell; colony
C)  colony; cell
D)  species; colony
E)  generation; cellF) A) and C)
G) None of the above

Question 11

After binary fission, daughter cells will differ genetically.

Accepted Answer

A) True 
 B)False

Question 12

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) None of the above
G) A) and D)

Question 13

The term phototroph 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) D) and E)
G) A) and B)

Question 14

Whether an organism is an autotroph or heterotroph depends on its source of nitrogen.

Accepted Answer

A) True 
 B)False

Question 15

A microaerophile

Accepted Answer

A)  grows best in an anaerobic jar.
B)  grows with or without oxygen.
C)  needs normal atmospheric levels of oxygen.
D)  requires a small amount of oxygen but won't grow at normal atmospheric levels.E) C) and D)
F) A) and B)

Question 16

Which of the following is an important mineral ion that is a component of chloroplasts and stabilizer of membranes and ribosomes?

Accepted Answer

A)  iron
B)  zinc
C)  calcium
D)  magnesium
E)  potassiumF) B) and C)
G) All of the above

Question 17

Which of the following is an important mineral ion of the cytochrome pigments used in cellular respiration?

Accepted Answer

A)  iron
B)  zinc
C)  calcium
D)  magnesium
E)  potassiumF) B) and E)
G) B) and C)

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 plants.F) A) and E)
G) C) and D)

Question 19

Which of the following microorganisms would find hypotonic conditions most detrimental?

Accepted Answer

A)  bacteria
B)  protozoa
C)  fungi
D)  algae
E)  cyanobacteriaF) C) and E)
G) None of the above

Question 20

Bacterial biofilms stimulate the immune system differently than planktonic bacteria.

Accepted Answer

A) True 
 B)False

Exam 7: Microbial Nutrition, Ecology, and Growth

The type of photosynthesis that does not produce oxygen

Correct Answer
verified

Whether an organism is an autotroph or heterotroph depends on its source of nitrogen.

Correct Answer
verified

The direct cell count, using a flow cytometer, can determine both viable cell numbers and number of dead cells in the sample.

Correct Answer
verified

Bacterial biofilms stimulate the immune system differently than planktonic bacteria.

Correct Answer
verified

The movement of molecules from an area of high concentration to an area of lower concentration is called

Correct Answer
verified

The methanogens, producers of methane gas, require environments that

Correct Answer
verified

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

Correct Answer
verified

The term phototroph refers to an organism that

Correct Answer
verified

An organism that uses CO₂ for its carbon needs and sunlight for its energy needs would be called a/an

Correct Answer
verified

After binary fission, daughter cells will differ genetically.

Correct Answer
verified

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

Correct Answer
verified

Which of the following microorganisms would find hypotonic conditions most detrimental?

Correct Answer
verified

A microaerophile

Correct Answer
verified

Correct Answer
verified

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

Correct Answer
verified

Which of the following is an important mineral ion that is a component of chloroplasts and stabilizer of membranes and ribosomes?

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

Which of the following is an important mineral ion of the cytochrome pigments used in cellular respiration?

Correct Answer
verified

Growth factors

Correct Answer
verified

Exam 7: Microbial Nutrition, Ecology, and Growth

The type of photosynthesis that does not produce oxygen

Correct AnswerverifiedShow Answer

Whether an organism is an autotroph or heterotroph depends on its source of nitrogen.

Correct AnswerverifiedShow Answer

The direct cell count, using a flow cytometer, can determine both viable cell numbers and number of dead cells in the sample.

Correct AnswerverifiedShow Answer

Bacterial biofilms stimulate the immune system differently than planktonic bacteria.

Correct AnswerverifiedShow Answer

The movement of molecules from an area of high concentration to an area of lower concentration is called

Correct AnswerverifiedShow Answer

The methanogens, producers of methane gas, require environments that

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 _____ on the agar surface represents one _____ from the sample.

Correct AnswerverifiedShow Answer

The term phototroph refers to an organism that

Correct AnswerverifiedShow Answer

An organism that uses CO2 for its carbon needs and sunlight for its energy needs would be called a/an

Correct AnswerverifiedShow Answer

After binary fission, daughter cells will differ genetically.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following microorganisms would find hypotonic conditions most detrimental?

Correct AnswerverifiedShow Answer

A microaerophile

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following is an important mineral ion that is a component of chloroplasts and stabilizer of membranes and ribosomes?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following is an important mineral ion of the cytochrome pigments used in cellular respiration?

Correct AnswerverifiedShow Answer

Growth factors

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

An organism that uses CO₂ for its carbon needs and sunlight for its energy needs would be called a/an

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

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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Correct Answer
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