Question 1

Which of the following statements is TRUE of disinfectants?

Accepted Answer

A)   They are effective in destroying endospores.
B)   They are used on living tissue.
C)   They are used for sterilization.
D)   They are used on inanimate surfaces.
E)   They are only effective for short periods of time (seconds to minutes) .

Question 2

What is the in-use test,and why is it more useful than other methods of evaluating disinfectants?

Accepted Answer

The in-use test is a method of evaluatin...

Question 3

Lysozyme is effective against nearly all disease causing agents.

Accepted Answer

A) True 
 B)False

Question 4

Which of the following would be used to sterilize a mattress?

Accepted Answer

A)   autoclaving
B)   formaldehyde
C)   ethylene oxide
D)   heavy metals
E)   non-ionizing radiation

Question 5

Which of the following types of radiation is nonionizing and has the shortest wavelength?

Accepted Answer

A)   ultraviolet light
B)   infrared radiation
C)   microwaves
D)   X rays
E)   gamma rays

Question 6

The lowest temperature that kills all cells in a broth in 10 minutes is known as the (microbial/terminal/thermal)death point.

Accepted Answer

The answer of The lowest temperature that kills all cells...

Question 7

What is the method of action of aldehydes?

Accepted Answer

A)   They disrupt cytoplasmic membranes.
B)   They inhibit enzymes.
C)   They damage nucleic acids.
D)   They disrupt membranes and enzyme function.
E)   They damage proteins and DNA.

Question 8

Alcohols are used for

Accepted Answer

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

Question 9

The process of filtration is a(n)

Accepted Answer

A)   disinfectant method.
B)   sterilizing method.
C)   sanitization method.
D)   antiseptic procedure.
E)   ineffective method for removing microbes.

Question 10

Antimicrobial agents that damage nucleic acids also affect

Accepted Answer

A)   the cell wall.
B)   the cell membrane.
C)   the viral envelope.
D)   endospores.
E)   protein synthesis.

Question 11

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

Accepted Answer

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

Question 12

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

Accepted Answer

A) True 
 B)False

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

The compound ethylene oxide is used in

Accepted Answer

A)   sanitization.
B)   sterilization.
C)   antisepsis.
D)   degerming.
E)   disinfection.

Question 15

Disinfectants known as (alcohols/oxidizers/aldehydes)have the chemical group -CHO,which reacts with and damages both proteins and nucleic acids.

Accepted Answer

The answer of Disinfectants known as (alcohols/oxidizers/aldehydes)have the chemical group...

Question 16

A chemical used to reduce potential pathogens on the skin is a(n)

Accepted Answer

A)   antiseptic.
B)   disinfectant.
C)   sanitizer.
D)   sterilizing agent.
E)   degermer.

Question 17

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

Accepted Answer

A) True 
 B)False

Question 18

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

Accepted Answer

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

Question 19

The process of freeze-drying microbes to preserve them is (denaturation/desiccation/lyophilization).

Accepted Answer

The answer of The process of freeze-drying microbes to preserve...

Question 20

A chemical agent that kills pathogenic microbes in general is a(n)

Accepted Answer

A)   sanitizer.
B)   germicide.
C)   disinfectant.
D)   fungicide.
E)   antiseptic.

Exam 9: Controlling Microbial Growth in the Environment

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

Correct AnswerverifiedShow Answer

What is the in-use test,and why is it more useful than other methods of evaluating disinfectants?

Correct AnswerverifiedThe in-use test is a method of evaluatin...View AnswerShow Answer

The lowest temperature that kills all cells in a broth in 10 minutes is known as the (microbial/terminal/thermal)death point.

Correct AnswerverifiedShow Answer

Which of the following types of radiation is nonionizing and has the shortest wavelength?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Antimicrobial agents that damage nucleic acids also affect

Correct AnswerverifiedShow Answer

Disinfectants known as (alcohols/oxidizers/aldehydes)have the chemical group -CHO,which reacts with and damages both proteins and nucleic acids.

Correct AnswerverifiedShow Answer

A chemical agent that kills pathogenic microbes in general is a(n)

Correct AnswerverifiedShow Answer

A chemical used to reduce potential pathogens on the skin is a(n)

Correct AnswerverifiedShow Answer

Which of the following would be used to sterilize a mattress?

Correct AnswerverifiedShow Answer

The compound ethylene oxide is used in

Correct AnswerverifiedShow Answer

What is the method of action of aldehydes?

Correct AnswerverifiedShow Answer

Which of the following statements is TRUE of disinfectants?

Correct AnswerverifiedShow Answer

The process of filtration is a(n)

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Alcohols are used for

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Lysozyme is effective against nearly all disease causing agents.

Correct AnswerverifiedShow Answer

The process of freeze-drying microbes to preserve them is (denaturation/desiccation/lyophilization).

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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The in-use test is a method of evaluatin...
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