Question 1

Which of the following is not true of glutaraldehyde?

Accepted Answer

A)  It cross-links proteins on cell surfaces.
B)  It is classified as a carcinogen.
C)  It inactivates endospores in 3 hours.
D)  It inactivates viruses.
E)  It does not damage plastics.F) B) and D)
G) B) and E)

Question 2

Which of the following types of control agents would be used to achieve sterility?

Accepted Answer

A)  Virucide
B)  Bactericide
C)  Germicide
D)  Sporicide
E)  FungicideF) B) and C)
G) A) and B)

Question 3

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

Accepted Answer

A) True 
 B)False

Question 4

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) B) and D)

Question 5

Which of the following microbial forms has the highest resistance to physical and chemical controls?

Accepted Answer

A)  Naked viruses
B)  Protozoan cysts
C)  Fungal spores
D)  Bacterial endospores
E)  YeastF) A) and B)
G) None of the above

Question 6

Iodophors include ______.

Accepted Answer

A)  betadine
B)  chlorhexidine
C)  alcohols
D)  chloramines
E)  tincture of iodineF) A) and E)
G) B) and C)

Question 7

The method of removing vegetative microbial life forms and debris to reduce contamination to safe levels is termed ______.

Accepted Answer

A)  antisepsis
B)  disinfection
C)  sterilization
D)  decontamination
E)  sanitizationF) C) and D)
G) All of the above

Question 8

Heavy metals work by

Accepted Answer

A)  binding to DNA.
B)  mutating DNA.
C)  rupturing the cell membrane.
D)  inactivating proteins.
E)  dissolving the cell wall.F) A) and B)
G) None of the above

Question 9

Most microbial contaminants of food are killed or inactivated at freezing temperatures.

Accepted Answer

A) True 
 B)False

Question 10

Chlorine and ethylene oxide are sterilizing gases.

Accepted Answer

A) True 
 B)False

Question 11

All microbicidal agents are sterilants.

Accepted Answer

A) True 
 B)False

Question 12

All of the following act as surfactants except ______.

Accepted Answer

A)  detergents
B)  quaternary ammonia
C)  iodine
D)  soaps
E)  alcoholsF) A) and B)
G) B) and C)

Question 13

_____ radiation excites atoms to a higher energy state within molecules such as DNA, which leads to the formation of pyrimidine dimers.

Accepted Answer

A)  Ultraviolet
B)  Ionizing
C)  Infrared
D)  Gamma
E)  ParticleF) C) and E)
G) All of the above

Question 14

A microorganism that is not motile and has stopped metabolizing is considered dead.

Accepted Answer

A) True 
 B)False

Question 15

Bacteriostatic agents kill bacterial cells.

Accepted Answer

A) True 
 B)False

Question 16

The removal of all life forms from inanimate objects is termed ______.

Accepted Answer

A)  antisepsis
B)  disinfection
C)  sterilization
D)  decontamination
E)  degermingF) A) and B)
G) A) and C)

Question 17

Ionizing radiation is more effective than nonionizing radiation in killing or inactivating microbes.

Accepted Answer

A) True 
 B)False

Question 18

Continued widespread use of the phenolic compound triclosan is advantageous in that it is important to remove as many organisms as possible from our hands and there is little risk of resistant organisms evolving.

Accepted Answer

A) True 
 B)False

Question 19

Which of the following germicides is/are also sporicidal?

Accepted Answer

A)  Betadine
B)  Chlorine
C)  Phenolics
D)  Chlorhexidine
E)  All of these except phenolics.F) B) and C)
G) A) and B)

Question 20

Alcohols are more effective at inactivating enveloped viruses than naked viruses.

Accepted Answer

A) True 
 B)False

Exam 11: Physical and Chemical Control of Microbes

Continued widespread use of the phenolic compound triclosan is advantageous in that it is important to remove as many organisms as possible from our hands and there is little risk of resistant organisms evolving.

Correct AnswerverifiedShow Answer

Which of the following types of control agents would be used to achieve sterility?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following germicides is/are also sporicidal?

Correct AnswerverifiedShow Answer

_____ radiation excites atoms to a higher energy state within molecules such as DNA, which leads to the formation of pyrimidine dimers.

Correct AnswerverifiedShow Answer

Most microbial contaminants of food are killed or inactivated at freezing temperatures.

Correct AnswerverifiedShow Answer

The method of removing vegetative microbial life forms and debris to reduce contamination to safe levels is termed ______.

Correct AnswerverifiedShow Answer

Bacteriostatic agents kill bacterial cells.

Correct AnswerverifiedShow Answer

Which of the following is not true of glutaraldehyde?

Correct AnswerverifiedShow Answer

The removal of all life forms from inanimate objects is termed ______.

Correct AnswerverifiedShow Answer

Heavy metals work by

Correct AnswerverifiedShow Answer

All microbicidal agents are sterilants.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Alcohols are more effective at inactivating enveloped viruses than naked viruses.

Correct AnswerverifiedShow Answer

Chlorine and ethylene oxide are sterilizing gases.

Correct AnswerverifiedShow Answer

Iodophors include ______.

Correct AnswerverifiedShow Answer

Ionizing radiation is more effective than nonionizing radiation in killing or inactivating microbes.

Correct AnswerverifiedShow Answer

All of the following act as surfactants except ______.

Correct AnswerverifiedShow Answer

A microorganism that is not motile and has stopped metabolizing is considered dead.

Correct AnswerverifiedShow Answer

Which of the following microbial forms has the highest resistance to physical and chemical controls?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified