Question 1

Human pathogens fall into the group called ______.

Accepted Answer

A)  halophiles
B)  thermophiles
C)  acidophiles
D)  mesophiles
E)  psychrophilesF) A) and E)
G) C) and D)

Question 2

This microbe is photosynthetic, but in the absence of light it can use organic compounds as an energy source.Its carbon source is an organic compound.The appropriate classification for this organism would be ______.

Accepted Answer

A)  chemoautotroph
B)  lithotroph
C)  photoautotroph
D)  photoheterotrophE) B) and D)
F) A) and B)

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

Lithoautotrophs use inorganic nutrients for carbon and energy sources.

Accepted Answer

A) True 
 B)False

Question 5

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

Accepted Answer

A) True 
 B)False

Question 6

After binary fission, daughter cells will differ genetically.

Accepted Answer

A) True 
 B)False

Question 7

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

Accepted Answer

A)  facilitated diffusion
B)  pinocytosis
C)  facilitated transport
D)  phagocytosis
E)  exocytosisF) B) and D)
G) A) and D)

Question 8

Which of the following require the cell to use energy?

Accepted Answer

A)  Osmosis
B)  Diffusion
C)  Facilitated diffusion
D)  EndocytosisE) All of the above
F) A) and B)

Question 9

An important mineral ion found in the cytochrome pigments of cellular respiration is ______.

Accepted Answer

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

Question 10

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

Accepted Answer

A) True 
 B)False

Question 11

An organic nutrient that cannot be synthesized by the organism and must be provided is called a(n)  ______.

Accepted Answer

A)  element
B)  trace element
C)  growth factor
D)  macronutrient
E)  compoundF) B) and E)
G) A) and C)

Question 12

Cultures of a bacterial strain were incubated in a refrigerator (5°C) , on a lab bench (22°C) , in a 37°C incubator, and in a 50°C incubator.After incubation, there was no growth at 37°C and 50°C, slight growth in the refrigerator, and abundant growth on the lab bench top.Which term best describes this organism?

Accepted Answer

A)  Halophile
B)  Psychrotroph
C)  Capnophile
D)  Mesophile
E)  AnaerobeF) A) and C)
G) B) and D)

Question 13

You want to experiment with microbial growth in various nutrients, so you inoculate a loopful of E. coli into a tube of honey. Which statement best describes what you expect to happen and why?

Accepted Answer

A)   E. coli does not grow because it has been dehydrated by the honey.
B)   E. coli will not grow because the excessive sugar is toxic.
C)   E. coli grows well in the honey because fructose is a good carbon source.
D)   E. coli do not grow because there is only sugar in the honey and no other nutrients.E) A) and C)
F) B) and D)

Question 14

An organism with a temperature growth range of 45°C to 60°C would be called a(n)  ______.

Accepted Answer

A)  psychrophile
B)  extremophile
C)  facultative psychrophile
D)  thermophile
E)  thermoduric microbeF) B) and E)
G) None of the above

Question 15

Nutrient absorption is mediated by the ______.

Accepted Answer

A)  nuclear membrane
B)  proteins in the periplasmic space
C)  peptidoglycan layer
D)  cell wall
E)  cell membraneF) None of the above
G) A) and B)

Question 16

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)  microaerophile
C)  facultative anaerobe
D)  obligate anaerobeE) C) and D)
F) A) and C)

Question 17

The movement of substances from lower to higher concentration across a semipermeable membrane via a specific protein carrier and cell expenditure of energy is called ______.

Accepted Answer

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

Question 18

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

Accepted Answer

A)  stationary phase
B)  prophase
C)  death phase
D)  lag phase
E)  exponential phaseF) C) and E)
G) All of the above

Question 19

After using jelly on a sandwich, you close the jar and place it on a room temperature shelf instead of in the refrigerator.When you open the jar several weeks later, you notice microbial growth on the surface.What type of organism is likely to grow in this environment?

Accepted Answer

A)  Bacteria
B)  Virus
C)  Protozoa
D)  FungusE) B) and D)
F) B) and C)

Question 20

A saprobe with a cell wall will utilize extracellular digestion.

Accepted Answer

A) True 
 B)False

Exam 7: Microbial Nutrition, Ecology, and Growth

After using jelly on a sandwich, you close the jar and place it on a room temperature shelf instead of in the refrigerator.When you open the jar several weeks later, you notice microbial growth on the surface.What type of organism is likely to grow in this environment?

Correct Answer
verified

An organism with a temperature growth range of 45°C to 60°C would be called a(n) ______.

Correct Answer
verified

Nutrient absorption is mediated by the ______.

Correct Answer
verified

An important mineral ion found in the cytochrome pigments of cellular respiration is ______.

Correct Answer
verified

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

Correct Answer
verified

An organic nutrient that cannot be synthesized by the organism and must be provided is called a(n) ______.

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

The movement of substances from lower to higher concentration across a semipermeable membrane via a specific protein carrier and cell expenditure of energy is called ______.

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

Human pathogens fall into the group called ______.

Correct Answer
verified

A saprobe with a cell wall will utilize extracellular digestion.

Correct Answer
verified

Which of the following require the cell to use energy?

Correct Answer
verified

After binary fission, daughter cells will differ genetically.

Correct Answer
verified

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

Correct Answer
verified

This microbe is photosynthetic, but in the absence of light it can use organic compounds as an energy source.Its carbon source is an organic compound.The appropriate classification for this organism would be ______.

Correct Answer
verified

You want to experiment with microbial growth in various nutrients, so you inoculate a loopful of E. coli into a tube of honey. Which statement best describes what you expect to happen and why?

Correct Answer
verified

Lithoautotrophs use inorganic nutrients for carbon and energy sources.

Correct Answer
verified

Exam 7: Microbial Nutrition, Ecology, and Growth

After using jelly on a sandwich, you close the jar and place it on a room temperature shelf instead of in the refrigerator.When you open the jar several weeks later, you notice microbial growth on the surface.What type of organism is likely to grow in this environment?

Correct AnswerverifiedShow Answer

An organism with a temperature growth range of 45°C to 60°C would be called a(n) ______.

Correct AnswerverifiedShow Answer

Nutrient absorption is mediated by the ______.

Correct AnswerverifiedShow Answer

An important mineral ion found in the cytochrome pigments of cellular respiration is ______.

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 at an exponential rate, is the ______.

Correct AnswerverifiedShow Answer

An organic nutrient that cannot be synthesized by the organism and must be provided is called a(n) ______.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The movement of substances from lower to higher concentration across a semipermeable membrane via a specific protein carrier and cell expenditure of energy is called ______.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

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

Human pathogens fall into the group called ______.

Correct AnswerverifiedShow Answer

A saprobe with a cell wall will utilize extracellular digestion.

Correct AnswerverifiedShow Answer

Which of the following require the cell to use energy?

Correct AnswerverifiedShow Answer

After binary fission, daughter cells will differ genetically.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

This microbe is photosynthetic, but in the absence of light it can use organic compounds as an energy source.Its carbon source is an organic compound.The appropriate classification for this organism would be ______.

Correct AnswerverifiedShow Answer

You want to experiment with microbial growth in various nutrients, so you inoculate a loopful of E. coli into a tube of honey. Which statement best describes what you expect to happen and why?

Correct AnswerverifiedShow Answer

Lithoautotrophs use inorganic nutrients for carbon and energy sources.

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Correct Answer
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verified

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verified

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