Question 1

Which of the following is NOT a feature associated with filtration?

Accepted Answer

A)   nitrocellulose or plastic membrane filters
B)   ability of some filters to trap viruses and proteins
C)   varying thicknesses of membrane filters used
D)   use of HEPA filters to filter air
E)   sterilization of heat- sensitive materialsF) All of the above
G) B) and D)

Question 2

The decimal reduction time is the time required to kill all the microbes in a given sample.

Accepted Answer

A) True 
 B)False

Question 3

is the physical removal of microbes.

Accepted Answer

A)   Sanitization
B)   Antisepsis
C)   Degerming
D)   Disinfection
E)   SterilizationF) A) and D)
G) A) and E)

Question 4

The process of incineration is used for

Accepted Answer

A)   degerming.
B)   disinfection.
C)   sterilization.
D)   sanitization.
E)   both disinfection and sanitization.F) D) and E)
G) A) and B)

Question 5

Antimicrobial agents usually work best at high temperatures and high pH levels.

Accepted Answer

A) True 
 B)False

Question 6

Disinfecting agents naturally produced by microorganisms are

Accepted Answer

A)   quats.
B)   triclosans.
C)   antimicrobials.
D)   halogens.
E)   aldehydes.F) B) and D)
G) C) and D)

Question 7

Which of the following was used in the past to prevent the transmission of gonorrhea from an infected mother to her newborn?

Accepted Answer

A)   beta- propiolactone
B)   thimerosal
C)   silver nitrate
D)   hydrogen peroxide
E)   hexachloropheneF) C) and E)
G) C) and D)

Question 8

Design an experiment to compare the effectiveness of a physical and a chemical method of disinfection.

Accepted Answer

Answers will vary. Appropriate controls ...

Question 9

Which of the following is the most appropriate pairing of microbe and biosafety level?

Accepted Answer

A)   E. coli, BSL- 3
B)   tuberculosis, BSL- 1
C)   anthrax, BSL- 1
D)   Ebola, BSL- 2
E)   methicillin- resistant Staphylococcus aureus (MRS
A)  , BSL- 2F) C) and E)
G) C) and D)

Question 10

Removal of microbes from the skin is antisepsis.

Accepted Answer

A) True 
 B)False

Question 11

Some sterilization procedures do not kill all the microbes that may be present. Explain how these procedures may for practical purposes still be considered sterilization.

Accepted Answer

Theoretically, sterilization is the comp...

Question 12

Which of the following is bacteriostatic?

Accepted Answer

A)   heating in an oven at 171°C for an hour
B)   autoclaving
C)   filtration
D)   freezing below 0°C
E)   flash PasteurizationF) A) and E)
G) A) and B)

Question 13

Natural antiseptics such as pine or clove oil are examples of antimicrobial compounds called (alcohols/phenolics/detergents).

Accepted Answer

The answer of Natural antiseptics such as pine or clove...

Question 14

Which of the following is used to sterilize items that should not, or cannot, be exposed to heat or water?

Accepted Answer

A)   hydrogen peroxide
B)   formaldehyde
C)   calcium hypochlorite
D)   ethylene oxide
E)   triclosanF) A) and D)
G) A) and E)

Question 15

Which of the following can be used to disinfect air?

Accepted Answer

A)   ultraviolet light
B)   HEPA filters
C)   ethylene oxide
D)   both HEPA filters and ultraviolet light
E)   both ethylene oxide and ultraviolet lightF) A) and D)
G) B) and D)

Question 16

Which of the following describes flash pasteurization?

Accepted Answer

A)   heating at 63°C for 30 minutes
B)   heating at 134°C for one second
C)   heating at 72°C for 15 seconds
D)   passing liquid through steam at 140°C
E)   heating at 72°C for 15 minutesF) A) and B)
G) A) and C)

Question 17

The (endospores/cysts/prions) are the infectious agents most resistant to antimicrobial agents or processes.

Accepted Answer

The answer of The (endospores/cysts/prions) are the infectious agents most...

Question 18

A scientist develops a new medication that is a protein compound and that must be administered by injection. Which of the following would be the most effective and safest means of preparing a sterile solution of the new medication?

Accepted Answer

A)   ultraviolet irradiation
B)   dilution with alcohol
C)   autoclaving
D)   lyophilization
E)   filtrationF) A) and E)
G) C) and D)

Question 19

The process of heating milk or fruit juice to levels that kill any pathogenic microbes present is known as (pasteurization/sanitization/lyophilization).

Accepted Answer

The answer of The process of heating milk or fruit...

Question 20

Alcohols are used for

Accepted Answer

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

Exam 9: Controlling Microbial Growth in the Environment

Disinfecting agents naturally produced by microorganisms are

Correct AnswerverifiedShow Answer

Which of the following can be used to disinfect air?

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Some sterilization procedures do not kill all the microbes that may be present. Explain how these procedures may for practical purposes still be considered sterilization.

Correct AnswerverifiedTheoretically, sterilization is the comp...View AnswerShow Answer

Which of the following is used to sterilize items that should not, or cannot, be exposed to heat or water?

Correct AnswerverifiedShow Answer

Design an experiment to compare the effectiveness of a physical and a chemical method of disinfection.

Correct AnswerverifiedAnswers will vary. Appropriate controls ...View AnswerShow Answer

Which of the following is NOT a feature associated with filtration?

Correct AnswerverifiedShow Answer

Antimicrobial agents usually work best at high temperatures and high pH levels.

Correct AnswerverifiedShow Answer

The (endospores/cysts/prions) are the infectious agents most resistant to antimicrobial agents or processes.

Correct AnswerverifiedShow Answer

Alcohols are used for

Correct AnswerverifiedShow Answer

Which of the following is bacteriostatic?

Correct AnswerverifiedShow Answer

The process of heating milk or fruit juice to levels that kill any pathogenic microbes present is known as (pasteurization/sanitization/lyophilization).

Correct AnswerverifiedShow Answer

The decimal reduction time is the time required to kill all the microbes in a given sample.

Correct AnswerverifiedShow Answer

Natural antiseptics such as pine or clove oil are examples of antimicrobial compounds called (alcohols/phenolics/detergents).

Correct AnswerverifiedShow Answer

The process of incineration is used for

Correct AnswerverifiedShow Answer

Removal of microbes from the skin is antisepsis.

Correct AnswerverifiedShow Answer

Which of the following was used in the past to prevent the transmission of gonorrhea from an infected mother to her newborn?

Correct AnswerverifiedShow Answer

Which of the following describes flash pasteurization?

Correct AnswerverifiedShow Answer

Which of the following is the most appropriate pairing of microbe and biosafety level?

Correct AnswerverifiedShow Answer

is the physical removal of microbes.

Correct AnswerverifiedShow Answer

A scientist develops a new medication that is a protein compound and that must be administered by injection. Which of the following would be the most effective and safest means of preparing a sterile solution of the new medication?

Correct AnswerverifiedShow Answer

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Theoretically, sterilization is the comp...
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Answers will vary. Appropriate controls ...
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