Question 1

_____ is a control method that removes microorganisms rather than inhibiting or killing them.

Accepted Answer

A)  Boiling
B)  Sterilization
C)  Radiation
D)  Filtration
E)  DisinfectionF) All of the above
G) A) and B)

Question 2

Which of the following is not a factor that affects germicidal activity?

Accepted Answer

A)  material being treated
B)  length of exposure
C)  strength of the germicide
D)  microorganism being treated
E)  All of the choices are factors.F) A) and C)
G) A) and B)

Question 3

Some microbial control agents are able to _____ cell proteins by breaking bonds that maintain the native state,the three-dimensional configuration of the proteins.

Accepted Answer

A)  denature
B)  bind
C)  dissolve
D)  mutateE) None of the above
F) A) and B)

Question 4

Microbial death occurs when there is

Accepted Answer

A)  no movement.
B)  no reproduction.
C)  a change in appearance.
D)  a decrease in size.
E)  All of the choices occur.F) A) and C)
G) A) and E)

Question 5

Hydrogen peroxide is used in the process of sterilizing instruments such as endoscopes.

Accepted Answer

A) True 
 B)False

Question 6

HEPA filters are used to remove microbes from

Accepted Answer

A)  air.
B)  liquids.
C)  human tissues.
D)  medical instruments.
E)  All of the choices are correct.F) A) and B)
G) A) and C)

Question 7

Electrons are ejected from atoms in cells when organisms are exposed to

Accepted Answer

A)  desiccation.
B)  ultraviolet light.
C)  ethyl alcohol.
D)  hydrogen peroxide.
E)  gamma rays and X rays.F) B) and E)
G) A) and D)

Question 8

Which is correct regarding the rate of microbial death?

Accepted Answer

A)  Cells die at increasingly greater rates.
B)  Only older cells die in a culture.
C)  Cells in a culture die at a constant rate.
D)  Upon contact with the control agent,all cells die at one time.
E)  Cells become metabolically inactive but are never killed.F) B) and C)
G) A) and E)

Question 9

Agents that can denature microbial proteins include all of the following except

Accepted Answer

A)  moist heat.
B)  alcohol.
C)  acids.
D)  metallic ions.
E)  X rays.F) All of the above
G) A) and C)

Question 10

Heavy metals work by

Accepted Answer

A)  rupturing the cell membrane.
B)  inactivating proteins.
C)  binding to DNA.
D)  dissolving the cell wall.
E)  mutating DNA.F) B) and E)
G) B) and C)

Question 11

Which of the following does not affect microbial nucleic acids?

Accepted Answer

A)  moist heat
B)  ultraviolet light
C)  X rays
D)  ethylene dioxide
E)  formaldehydeF) B) and E)
G) B) and D)

Question 12

Aniline dyes like crystal violet have antimicrobial activity particularly against gram-positive bacteria and some fungi.

Accepted Answer

A) True 
 B)False

Question 13

Which of the following represents the use of osmotic pressure as a microbial control method?

Accepted Answer

A)  bleaching a kitchen counter
B)  salting of meat
C)  rinsing of a cut with Betadine
D)  exposing dental equipment to UV lightE) B) and D)
F) None of the above

Question 14

Microbicidal agents are sterilants.

Accepted Answer

A) True 
 B)False

Question 15

The removal of all life forms from inanimate objects is termed

Accepted Answer

A)  antisepsis.
B)  disinfection.
C)  sterilization.
D)  decontamination.
E)  degerming.F) None of the above
G) All of the above

Question 16

Vials of microorganisms that undergo the freeze-drying process called _____,will remain preserved and viable for years.

Accepted Answer

A)  desiccation
B)  flash freeze
C)  lyophilization
D)  pasteurization
E)  sterilizationF) A) and C)
G) D) and E)

Question 17

All of the following act as surfactants except

Accepted Answer

A)  detergents.
B)  soaps.
C)  quaternary ammonia.
D)  alcohols.
E)  iodine.F) A) and B)
G) All of the above

Question 18

The alcohol wipe used on a patient's skin before an injection is an example of

Accepted Answer

A)  antisepsis.
B)  disinfection.
C)  sterilization.
D)  decontamination.
E)  sanitization.F) A) and D)
G) A) and C)

Question 19

Physical agents for controlling microbial growth include all of the following except

Accepted Answer

A)  ultraviolet radiation.
B)  boiling water.
C)  HEPA filters.
D)  pasteurization.
E)  hydrogen peroxide.F) A) and E)
G) B) and E)

Question 20

The sterilizing gas used in chemiclaves is

Accepted Answer

A)  ethylene oxide.
B)  iodophor.
C)  glutaraldehyde.
D)  formaldehyde.
E)  chlorine dioxide.F) A) and B)
G) A) and C)

Exam 11: Physical and Chemical Control of Microbes

Microbial death occurs when there is

Correct AnswerverifiedShow Answer

The removal of all life forms from inanimate objects is termed

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Vials of microorganisms that undergo the freeze-drying process called _____,will remain preserved and viable for years.

Correct AnswerverifiedShow Answer

Some microbial control agents are able to _____ cell proteins by breaking bonds that maintain the native state,the three-dimensional configuration of the proteins.

Correct AnswerverifiedShow Answer

Hydrogen peroxide is used in the process of sterilizing instruments such as endoscopes.

Correct AnswerverifiedShow Answer

Which of the following does not affect microbial nucleic acids?

Correct AnswerverifiedShow Answer

Which of the following is not a factor that affects germicidal activity?

Correct AnswerverifiedShow Answer

Which of the following represents the use of osmotic pressure as a microbial control method?

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HEPA filters are used to remove microbes from

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Heavy metals work by

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Physical agents for controlling microbial growth include all of the following except

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The alcohol wipe used on a patient's skin before an injection is an example of

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Aniline dyes like crystal violet have antimicrobial activity particularly against gram-positive bacteria and some fungi.

Correct AnswerverifiedShow Answer

The sterilizing gas used in chemiclaves is

Correct AnswerverifiedShow Answer

Microbicidal agents are sterilants.

Correct AnswerverifiedShow Answer

Electrons are ejected from atoms in cells when organisms are exposed to

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Agents that can denature microbial proteins include all of the following except

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_____ is a control method that removes microorganisms rather than inhibiting or killing them.

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Which is correct regarding the rate of microbial death?

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All of the following act as surfactants except

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