Question 1

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 2

Disinfectants that damage membranes include

Accepted Answer

A)   alcohol.
B)   phenolics.
C)   iodine.
D)   hydrogen peroxide.
E)   both alcohol and phenolics.F) A) and D)
G) D) and E)

Question 3

The cell walls of mycobacteria make them vulnerable to water soluble chemical agents.

Accepted Answer

A) True 
 B)False

Question 4

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...

Question 5

Betadine contains what type of chemical agent?

Accepted Answer

A)   alcohol
B)   aldehyde
C)   halogen
D)   heavy metal
E)   phenolicF) A) and D)
G) A) and B)

Question 6

The antimicrobial chemical pictured above in Figure 9.1 is a(n) (phenolic/surfactant/enzyme) compound found in many consumer products.

Accepted Answer

The answer of  
The antimicrobial chemical pictured above in...

Question 7

Why are endospores used to measure the effectiveness of autoclave sterilization?

Accepted Answer

A)   Endospores are easy to store in the lab until needed.
B)   Endospores are very simple structures and easy to detect.
C)   Endospores are very hard to kill.
D)   Endospores are composed of all the molecules found in living cells.
E)   Endospores of different bacteria are destroyed at different temperatures and can be used to calibrate autoclave temperatures.F) A) and E)
G) A) and B)

Question 8

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 9

Quaternary ammonium compounds ("quats")  are used for

Accepted Answer

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

Question 10

Which of the following is bacteriostatic?

Accepted Answer

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

Question 11

The phenol coefficient is one of the most widely used measurements of an antimicrobial agent's effectiveness.

Accepted Answer

A) True 
 B)False

Question 12

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)   autoclaving
B)   filtration
C)   dilution with alcohol
D)   lyophilization
E)   ultraviolet irradiationF) B) and D)
G) A) and C)

Question 13

Which of the following is an example of pasteurization?

Accepted Answer

A)   A public toilet is treated with disinfectants.
B)   A surgeon washes her hands before surgery.
C)   Heat is used to kill potential pathogens in apple juice.
D)   An autoclave is used to prepare nutrient agar.
E)   A nurse prepares an injection site with an alcohol swab.F) B) and E)
G) A) and B)

Question 14

Disinfecting agents naturally produced by microorganisms are

Accepted Answer

A)   aldehydes.
B)   antibiotics.
C)   halogens.
D)   quaternary ammonium compounds.
E)   triclosans.F) None of the above
G) A) and B)

Question 15

Which of the following is a sterilizing agent?

Accepted Answer

A)   ozone
B)   hydrogen peroxide
C)   peracetic acid
D)   dish soap
E)   ozone and hydrogen peroxideF) A) and E)
G) C) and D)

Exam 9: Controlling Microbial Growth in the Environment

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

Correct Answer
verified

Why are endospores used to measure the effectiveness of autoclave sterilization?

Correct Answer
verified

Quaternary ammonium compounds ("quats") are used for

Correct Answer
verified

Disinfecting agents naturally produced by microorganisms are

Correct Answer
verified

Which of the following is bacteriostatic?

Correct Answer
verified

The cell walls of mycobacteria make them vulnerable to water soluble chemical agents.

Correct Answer
verified

The antimicrobial chemical pictured above in Figure 9.1 is a(n) (phenolic/surfactant/enzyme) compound found in many consumer products.

Correct Answer
verified

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 Answer
verified

Disinfectants that damage membranes include

Correct Answer
verified

Which of the following is an example of pasteurization?

Correct Answer
verified

Betadine contains what type of chemical agent?

Correct Answer
verified

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

Correct Answer
verified

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 Answer
verified
Theoretically, sterilization is the comp...
View Answer

The phenol coefficient is one of the most widely used measurements of an antimicrobial agent's effectiveness.

Correct Answer
verified

Which of the following is a sterilizing agent?

Correct Answer
verified

Exam 9: Controlling Microbial Growth in the Environment

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

Correct AnswerverifiedShow Answer

Why are endospores used to measure the effectiveness of autoclave sterilization?

Correct AnswerverifiedShow Answer

Quaternary ammonium compounds ("quats") are used for

Correct AnswerverifiedShow Answer

Disinfecting agents naturally produced by microorganisms are

Correct AnswerverifiedShow Answer

Which of the following is bacteriostatic?

Correct AnswerverifiedShow Answer

The cell walls of mycobacteria make them vulnerable to water soluble chemical agents.

Correct AnswerverifiedShow Answer

The antimicrobial chemical pictured above in Figure 9.1 is a(n) (phenolic/surfactant/enzyme) compound found in many consumer products.

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

Disinfectants that damage membranes include

Correct AnswerverifiedShow Answer

Which of the following is an example of pasteurization?

Correct AnswerverifiedShow Answer

Betadine contains what type of chemical agent?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

The phenol coefficient is one of the most widely used measurements of an antimicrobial agent's effectiveness.

Correct AnswerverifiedShow Answer

Which of the following is a sterilizing agent?

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
Theoretically, sterilization is the comp...
View Answer

Correct Answer
verified

Correct Answer
verified