Question 1

If a parent cell divides through 8 generations, how many cells will result?

Accepted Answer

A)   8
B)   64
C)   128
D)   256
E)   100,000,000F) B) and C)
G) A) and C)

Question 2

The time interval going from a single bacterial 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 timeF) C) and D)
G) B) and E)

Question 3

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

Accepted Answer

A) True 
 B)False

Question 4

Aerobic respiration is an example of ________.

Accepted Answer

A)   photosynthesis
B)   methanoheterophy
C)   photoheterotrophy
D)   chemoheterotrophy
E)   photoautotrophyF) B) and E)
G) C) and E)

Question 5

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

Accepted Answer

A) True 
 B)False

Question 6

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

Accepted Answer

A)   hypertonic
B)   hypotonic
C)   isotonic
D)   All of the choices are correct.E) A) and D)
F) A) and B)

Question 7

Following the patient's surgical procedure, he is admitted to the neurological intensive care unit. Interventions are implemented to decrease intracranial pressure, including the administration of intravenous hypertonic saline. Which of the following do you anticipate as the therapeutic response to the administration of this medication?

Accepted Answer

A)   Decreased extravascular volume and increased intravascular volume
B)   Decreased extravascular volume and decreased intravascular volume
C)   Increased extravascular volume and increased intravascular volume
D)   Increased extravascular volume and decreased intravascular volumeE) B) and C)
F) C) and D)

Question 8

The term chemoheterotroph refers to an organism that ________.

Accepted Answer

A)   uses CO2 for its carbon source
B)   must obtain inorganic compounds for its energy source
C)   gets energy from sunlight
D)   gets energy by oxidizing chemical compounds
E)   does not need a carbon sourceF) D) and E)
G) All of the above

Question 9

An organism that grows slowly in the cold but has an optimum growth temperature of 25° C is called a(n)  ________.

Accepted Answer

A)   extremophile
B)   thermophile
C)   psychrophile
D)   psychrotroph
E)   thermoduricF) A) and B)
G) A) and C)

Question 10

The phase of the bacterial growth curve in which the rate of cell division equals the rate of cell death is the ________.

Accepted Answer

A)   lag phase
B)   log phase
C)   stationary phase
D)   death phase
E)   telophaseF) C) and D)
G) A) and D)

Question 11

Most of the dry weight of a microbial cell is from ________.

Accepted Answer

A)   inorganic compounds
B)   minerals
C)   water
D)   organic compounds
E)   saltsF) A) and B)
G) C) and E)

Question 12

During which stages of bacterial growth is an infected patient most at risk of spreading the organism to others?

Accepted Answer

A)   Lag phase and exponential growth phase
B)   Exponential growth phase and stationary growth phase
C)   Stationary growth phase and death phase
D)   Lag phase, stationary growth phase, and death phaseE) None of the above
F) All of the above

Question 13

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

Accepted Answer

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

Question 14

At time = 0, 200 ml of broth receives an initial inoculum of bacteria. 0.1 ml of the bacterial culture is taken from the culture at repeated intervals, diluted in liquid agar and spread on a plate containing solid media. After incubation, the plate from time = 420 min yields 62 colonies from the 0.1 ml sample. The total estimated number of cells in the flask at t = 420 min is ________.

Accepted Answer

A)   124,000
B)   12,400
C)   62
D)   26,040E) None of the above
F) B) and C)

Question 15

At 12:35 pm, 20 Salmonella enteritidis cells were present in the remains of a Caesar salad at a picnic. 5 hours later, the picnic organizer ate the rest of the salad at home. S. enteritidis divides every 20 minutes; how many cells (Nt)  were consumed if Nt = N(2n) ?

Accepted Answer

A)   655,360 cells
B)   100 cells
C)   327,680 cells
D)   1,000,000 cells
E)   1 x 1015 cellsF) A) and B)
G) B) and E)

Question 16

The direct cell count, using a cytometer, can calculate viable cell numbers from a sample.

Accepted Answer

A) True 
 B)False

Question 17

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

Accepted Answer

A)   lag phase
B)   exponential (log)  phase
C)   stationary phase
D)   death phase
E)   prophaseF) B) and E)
G) A) and B)

Question 18

Saprobes do not need a carbon source for growth and metabolism.

Accepted Answer

A) True 
 B)False

Question 19

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) C) and D)
G) A) and C)

Question 20

When whole cells or large molecules in solution are engulfed by a cell, this endocytosis is specifically termed ________.

Accepted Answer

A)   pinocytosis
B)   phagocytosis
C)   facilitated transport
D)   facilitated diffusion
E)   exocytosisF) None of the above
G) B) and C)

Exam 6: Microbial Nutrition and Growth

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

Correct Answer
verified

Most of the dry weight of a microbial cell is from ________.

Correct Answer
verified

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

Correct Answer
verified

Saprobes do not need a carbon source for growth and metabolism.

Correct Answer
verified

Aerobic respiration is an example of ________.

Correct Answer
verified

If a parent cell divides through 8 generations, how many cells will result?

Correct Answer
verified

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

During which stages of bacterial growth is an infected patient most at risk of spreading the organism to others?

Correct Answer
verified

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

Correct Answer
verified

The direct cell count, using a cytometer, can calculate viable cell numbers from a sample.

Correct Answer
verified

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

Correct Answer
verified

When whole cells or large molecules in solution are engulfed by a cell, this endocytosis is specifically termed ________.

Correct Answer
verified

The time interval going from a single bacterial parent cell to two new daughter cells is called the ________.

Correct Answer
verified

At 12:35 pm, 20 Salmonella enteritidis cells were present in the remains of a Caesar salad at a picnic. 5 hours later, the picnic organizer ate the rest of the salad at home. S. enteritidis divides every 20 minutes; how many cells (N_t) were consumed if N_t = N(2ⁿ) ?

Correct Answer
verified

The term chemoheterotroph refers to an organism that ________.

Correct Answer
verified

An organism that grows slowly in the cold but has an optimum growth temperature of 25° C is called a(n) ________.

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 phase of the bacterial growth curve in which the rate of cell division equals the rate of cell death is the ________.

Correct Answer
verified

Exam 6: Microbial Nutrition and Growth

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

Correct AnswerverifiedShow Answer

Most of the dry weight of a microbial cell is from ________.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Saprobes do not need a carbon source for growth and metabolism.

Correct AnswerverifiedShow Answer

Aerobic respiration is an example of ________.

Correct AnswerverifiedShow Answer

If a parent cell divides through 8 generations, how many cells will result?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

During which stages of bacterial growth is an infected patient most at risk of spreading the organism to others?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The direct cell count, using a cytometer, can calculate viable cell numbers from a sample.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

When whole cells or large molecules in solution are engulfed by a cell, this endocytosis is specifically termed ________.

Correct AnswerverifiedShow Answer

The time interval going from a single bacterial parent cell to two new daughter cells is called the ________.

Correct AnswerverifiedShow Answer

At 12:35 pm, 20 Salmonella enteritidis cells were present in the remains of a Caesar salad at a picnic. 5 hours later, the picnic organizer ate the rest of the salad at home. S. enteritidis divides every 20 minutes; how many cells (Nt) were consumed if Nt = N(2n) ?

Correct AnswerverifiedShow Answer

The term chemoheterotroph refers to an organism that ________.

Correct AnswerverifiedShow Answer

An organism that grows slowly in the cold but has an optimum growth temperature of 25° C is called a(n) ________.

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 phase of the bacterial growth curve in which the rate of cell division equals the rate of cell death is the ________.

Correct AnswerverifiedShow Answer

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
verified

Correct Answer
verified

Correct Answer
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Correct Answer
verified

At 12:35 pm, 20 Salmonella enteritidis cells were present in the remains of a Caesar salad at a picnic. 5 hours later, the picnic organizer ate the rest of the salad at home. S. enteritidis divides every 20 minutes; how many cells (N_t) were consumed if N_t = N(2ⁿ) ?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified