Question 1

An important mineral ion that is a component of chloroplasts and stabilizer of membranes and ribosomes is

Accepted Answer

A)  Iron
B)  Zinc
C)  Calcium
D)  Magnesium
E)  PotassiumF) C) and E)
G) D) and E)

Question 2

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 sourceF) A) and D)
G) B) and C)

Question 3

Growth factors

Accepted Answer

A)  Are inorganic
B)  Are synthesized by organism
C)  Contain elemental oxygen
D)  Cannot be synthesized by the organism
E)  All of the choices are correctF) A) and E)
G) A) and C)

Question 4

In _____ conditions, the cell wall will help prevent the cell from bursting.

Accepted Answer

A)  Hypertonic
B)  Hypotonic
C)  Isotonic
D)  Mesotonic
E)  All of the choices are correctF) C) and D)
G) A) and C)

Question 5

Whether an organism is a phototroph or a chemotroph depends on its source of energy.

Accepted Answer

A) True 
 B)False

Question 6

A saprobe with a cell wall will utilize extracellular digestion.

Accepted Answer

A) True 
 B)False

Question 7

Nutrient absorption is mediated by the

Accepted Answer

A)  Cell wall
B)  Peptidoglycan layer
C)  Proteins in the periplasmic space
D)  Cell membrane
E)  Nuclear membraneF) A) and B)
G) All of the above

Question 8

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)  EndocytosisF) All of the above
G) B) and D)

Question 9

An important mineral ion of the cytochrome pigments of cellular respiration is

Accepted Answer

A)  Iron
B)  Zinc
C)  Calcium
D)  Magnesium
E)  PotassiumF) A) and B)
G) A) and C)

Question 10

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 metabolismF) B) and C)
G) A) and E)

Question 11

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 anaerobeF) A) and C)
G) B) and D)

Question 12

Human pathogens fall into the group

Accepted Answer

A)  Psychrophiles
B)  Thermophiles
C)  Halophiles
D)  Mesophiles
E)  AcidophilesF) A) and E)
G) A) and D)

Question 13

Phosphorus is one of the major elements needed in larger quantities by microorganisms.

Accepted Answer

A) True 
 B)False

Question 14

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 CO2F) A) and E)
G) A) and D)

Question 15

In a commensal relationship, the commensal benefits but the cohabitant is neither harmed nor benefited.

Accepted Answer

A) True 
 B)False

Question 16

The use of energy by a cell to enclose a substance in its membrane by forming a vacuole and engulfing it is called

Accepted Answer

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

Question 17

Anaerobes can be cultured in a CO2 environment.

Accepted Answer

A) True 
 B)False

Question 18

Aerobic respiration is an example of

Accepted Answer

A)  Photosynthesis
B)  Methanoheterophy
C)  Photoheterotrophy
D)  Chemoheterotrophy
E)  Photo autotrophyF) A) and B)
G) D) and E)

Question 19

The phase of the bacterial growth curve that shows the maximum rate of cell division is the

Accepted Answer

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

Question 20

The term obligate 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 metabolismF) A) and B)
G) B) and E)

Exam 7: Microbial Nutrition, Ecology, and Growth

Aerobic respiration is an example of

Correct AnswerverifiedShow Answer

In _____ conditions, the cell wall will help prevent the cell from bursting.

Correct AnswerverifiedShow Answer

Human pathogens fall into the group

Correct AnswerverifiedShow Answer

The phase of the bacterial growth curve that shows the maximum rate of cell division is the

Correct AnswerverifiedShow Answer

Phosphorus is one of the major elements needed in larger quantities by microorganisms.

Correct AnswerverifiedShow Answer

The use of energy by a cell to enclose a substance in its membrane by forming a vacuole and engulfing it is called

Correct AnswerverifiedShow Answer

A saprobe with a cell wall will utilize extracellular digestion.

Correct AnswerverifiedShow Answer

Nutrient absorption is mediated by the

Correct AnswerverifiedShow Answer

Growth factors

Correct AnswerverifiedShow Answer

An important mineral ion that is a component of chloroplasts and stabilizer of membranes and ribosomes is

Correct AnswerverifiedShow Answer

The methanogens, producers of methane gas, require environments that

Correct AnswerverifiedShow Answer

Whether an organism is a phototroph or a chemotroph depends on its source of energy.

Correct AnswerverifiedShow Answer

The term obligate refers to

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

In a commensal relationship, the commensal benefits but the cohabitant is neither harmed nor benefited.

Correct AnswerverifiedShow Answer

Anaerobes can be cultured in a CO2 environment.

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 term facultative refers to

Correct AnswerverifiedShow Answer

The term heterotroph refers to an organism that

Correct AnswerverifiedShow Answer

An important mineral ion of the cytochrome pigments of cellular respiration is

Correct AnswerverifiedShow Answer

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Anaerobes can be cultured in a CO₂ environment.

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