Question 1

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

Accepted Answer

A) True 
 B)False

Question 2

An organism that can exist in both oxygen and oxygen-less environments is a(n)

Accepted Answer

A)  Aerobe
B)  Obligate aerobe
C)  Facultative anaerobe
D)  Microaerophile
E)  Obligate anaerobeF) A) and B)
G) A) and C)

Question 3

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

Accepted Answer

A) True 
 B)False

Question 4

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

Question 5

When microbes in close nutritional relationship and one benefits but the other is not harmed, it is called

Accepted Answer

A)  Symbiosis
B)  Satellitism
C)  Commensalism
D)  Mutualism
E)  SynergismF) B) and D)
G) C) and D)

Question 6

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 sourceF) B) and C)
G) A) and E)

Question 7

The majority of microbes live and grow in habitats between pH 7 and 9.

Accepted Answer

A) True 
 B)False

Question 8

The E. coli that normally live in the human large intestines and produce vitamin K that the body uses would be best termed a _____ relationship.

Accepted Answer

A)  Parasitic
B)  Saprobic
C)  Commensal
D)  Mutualistic
E)  None of the choices are correctF) A) and B)
G) A) and C)

Question 9

The phase of the bacterial growth curve in which the rate of multiplication equals the rate of cell death is the

Accepted Answer

A)  Lag phase
B)  Log phase
C)  Stationary phase
D)  Death phase
E)  TelophaseF) A) and B)
G) A) and C)

Question 10

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 sourceF) B) and C)
G) None of the above

Question 11

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

Accepted Answer

A)  Bacteria
B)  Protozoa
C)  Fungi
D)  Algae
E)  CyanobacteriaF) All of the above
G) B) and D)

Question 12

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 ∘\circ∘ C incubator and on the shelf of a 50 ∘\circ∘ C incubator.After incubation, there was no growth at 37 ∘\circ∘  C and 50 ∘\circ∘  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)  Capnophile F) A) and B)
G) B) and D)

Question 13

Diffusion of water through a semi permeable membrane is called

Accepted Answer

A)  Facilitated diffusion
B)  Diffusion
C)  Active transport
D)  Osmosis
E)  EndocytosisF) A) and D)
G) C) and D)

Question 14

A microorganism that does not have catalase or superoxide dismutase would find it difficult to live in an environment with

Accepted Answer

A)  Carbon dioxide
B)  Oxygen
C)  High salt
D)  Temperatures above 37 ∘\circ∘  C
E)  High acidity F) A) and B)
G) A) and C)

Question 15

Inorganic nitrogen must be converted to ammonia to be used by a cell.

Accepted Answer

A) True 
 B)False

Question 16

The movement of substances from lower to higher concentration across a semi permeable 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)  EndocytosisF) None of the above
G) B) and C)

Question 17

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)  None of the choices are correctF) A) and B)
G) A) and C)

Question 18

What compound has the highest concentration in a cell?

Accepted Answer

A)  CO2
B)  CH4
C)  H2O
D)  Glucose
E)  NH3F) B) and D)
G) None of the above

Question 19

Obligate saprobes can adapt to a living host.

Accepted Answer

A) True 
 B)False

Question 20

An organism that cannot tolerate an oxygen environment is a(n)

Accepted Answer

A)  Aerobe
B)  Obligate aerobe
C)  Facultative anaerobe
D)  Microaerophile
E)  Obligate anaerobeF) B) and C)
G) D) and E)

Exam 7: Microbial Nutrition, Ecology, and Growth

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

Correct Answer
verified

Obligate saprobes can adapt to a living host.

Correct Answer
verified

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

Correct Answer
verified

A microaerophile

Correct Answer
verified

An organism that can exist in both oxygen and oxygen-less environments is a(n)

Correct Answer
verified

The term autotroph refers to an organism that:

Correct Answer
verified

The E. coli that normally live in the human large intestines and produce vitamin K that the body uses would be best termed a _____ relationship.

Correct Answer
verified

The majority of microbes live and grow in habitats between pH 7 and 9.

Correct Answer
verified

The term phototroph refers to an organism that

Correct Answer
verified

Diffusion of water through a semi permeable membrane is called

Correct Answer
verified

The phase of the bacterial growth curve in which the rate of multiplication equals the rate of cell death is the

Correct Answer
verified

When microbes in close nutritional relationship and one benefits but the other is not harmed, it is called

Correct Answer
verified

What compound has the highest concentration in a cell?

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

Inorganic nitrogen must be converted to ammonia to be used by a cell.

Correct Answer
verified

An organism that cannot tolerate an oxygen environment is a(n)

Correct Answer
verified

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

Correct Answer
verified

A microorganism that does not have catalase or superoxide dismutase would find it difficult to live in an environment with

Correct Answer
verified

Exam 7: Microbial Nutrition, Ecology, and Growth

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

Correct AnswerverifiedShow Answer

Obligate saprobes can adapt to a living host.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

A microaerophile

Correct AnswerverifiedShow Answer

An organism that can exist in both oxygen and oxygen-less environments is a(n)

Correct AnswerverifiedShow Answer

The term autotroph refers to an organism that:

Correct AnswerverifiedShow Answer

The E. coli that normally live in the human large intestines and produce vitamin K that the body uses would be best termed a _____ relationship.

Correct AnswerverifiedShow Answer

The majority of microbes live and grow in habitats between pH 7 and 9.

Correct AnswerverifiedShow Answer

The term phototroph refers to an organism that

Correct AnswerverifiedShow Answer

Diffusion of water through a semi permeable membrane is called

Correct AnswerverifiedShow Answer

The phase of the bacterial growth curve in which the rate of multiplication equals the rate of cell death is the

Correct AnswerverifiedShow Answer

When microbes in close nutritional relationship and one benefits but the other is not harmed, it is called

Correct AnswerverifiedShow Answer

What compound has the highest concentration in a cell?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Inorganic nitrogen must be converted to ammonia to be used by a cell.

Correct AnswerverifiedShow Answer

An organism that cannot tolerate an oxygen environment is a(n)

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

A microorganism that does not have catalase or superoxide dismutase would find it difficult to live in an environment with

Correct AnswerverifiedShow Answer

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Correct Answer
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