Question 1

Which of the following is an example of sanitization?

Accepted Answer

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

Question 2

Ninety percent alcohol is more effective at denaturing protein than 100% alcohol.

Accepted Answer

A) True 
 B)False

Question 3

Hypertonic environments inactivate microbial enzymes by removing water from cells.

Accepted Answer

A) True 
 B)False

Question 4

Which of the following is a true statement concerning microbial death?

Accepted Answer

A)  It can be used to evaluate the efficacy of antimicrobial agents. 
B)  It speeds up over time of exposure to an antimicrobial agent. 
C)  It is the permanent loss of a microbe's reproductive ability. 
D)  Both A and C are correct. 
E)  A, B, and C are correct. 
A)  It can be used to evaluate the efficacy of antimicrobial agents. 
B)  It speeds up over time of exposure to an antimicrobial agent. 
C)  It is the permanent loss of a microbe's reproductive ability. 
D)  Both A and C are correct. 
E)  A, B, and C are correct.

Question 5

Which of the following is a sterilizing agent?

Accepted Answer

A)  ozone 
B)  peracetic acid 
C)  hydrogen peroxide 
D)  Both A and C are correct. 
E)  A, B, and C are correct. 
A)  ozone 
B)  peracetic acid 
C)  hydrogen peroxide 
D)  Both A and C are correct. 
E)  A, B, and C are correct.

Question 6

All of the following are characteristics of aldehydes EXCEPT:

Accepted Answer

A)  they are used in aqueous solutions. 
B)  some can sterilize after long periods of time. 
C)  they are used only to preserve dead tissues. 
D)  they are usually hazardous to humans. 
E)  they denature proteins. 
A)  they are used in aqueous solutions. 
B)  some can sterilize after long periods of time. 
C)  they are used only to preserve dead tissues. 
D)  they are usually hazardous to humans. 
E)  they denature proteins.

Question 7

The amount of time needed to sterilize materials using moist heat is (greater than/less than) the time needed to sterilize using dry heat.

Accepted Answer

The answer of The amount of time needed to sterilize...

Question 8

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

Accepted Answer

A) True 
 B)False

Question 9

By themselves, soaps have only degerming activity, not antimicrobial activity.

Accepted Answer

A) True 
 B)False

Question 10

Which of the following is a target of pasteurization?

Accepted Answer

A)  Brucella melitensis 
B)  Neisseria gonorrhoeae 
C)  Bacillus stearothermophilus 
D)  Chlamydia trachomatis 
E)  Clostridium botulinum 
A)  Brucella melitensis 
B)  Neisseria gonorrhoeae 
C)  Bacillus stearothermophilus 
D)  Chlamydia trachomatis 
E)  Clostridium botulinum

Question 11

All of the following are associated with filtration EXCEPT:

Accepted Answer

A)  sterilization of heat- sensitive materials. 
B)  nitrocellulose or plastic membrane filters. 
C)  viruses and proteins can be trapped by some filters. 
D)  varying thicknesses of membrane filters used. 
E)  HEPA filters are used to filter air. 
A)  sterilization of heat- sensitive materials. 
B)  nitrocellulose or plastic membrane filters. 
C)  viruses and proteins can be trapped by some filters. 
D)  varying thicknesses of membrane filters used. 
E)  HEPA filters are used to filter air.

Question 12

is the process of freeze- drying microbes to preserve them.

Accepted Answer

The answer of is the process of freeze- drying microbes...

Question 13

Antimicrobial agents that interfere with nucleic acids also stop protein synthesis because

Accepted Answer

A)  the ribosome contains ribozymes. 
B)  nucleic acids are involved in the production of proteins. 
C)  proteins are involved in the production of nucleic acids. 
D)  Both A and B are correct. 
E)  A, B, and C are correct. 
A)  the ribosome contains ribozymes. 
B)  nucleic acids are involved in the production of proteins. 
C)  proteins are involved in the production of nucleic acids. 
D)  Both A and B are correct. 
E)  A, B, and C are correct.

Question 14

An environment may contain some microbes and still be considered sterile under certain conditions.

Accepted Answer

A) True 
 B)False

Question 15

Which of the following has been incorporated into consumer products such as diapers and cutting boards?

Accepted Answer

A)  hexachlorophene 
B)  peracetic acid 
C)  thimerosal 
D)  triclosan 
E)  ethylene oxide 
A)  hexachlorophene 
B)  peracetic acid 
C)  thimerosal 
D)  triclosan 
E)  ethylene oxide

Question 16

The lowest temperature that kills all cells in a broth in 10 minutes is known as the .

Accepted Answer

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

Question 17

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)  silver nitrate 
B)  hydrogen peroxide 
C)  thimerosal 
D)  beta- propiolactone 
E)  hexachlorophene 
A)  silver nitrate 
B)  hydrogen peroxide 
C)  thimerosal 
D)  beta- propiolactone 
E)  hexachlorophene

Question 18

Which of the following antimicrobial agents is the most toxic to humans?

Accepted Answer

A)  quats 
B)  iodophors 
C)  ethylene oxide 
D)  chloramines 
E)  70% alcohol 
A)  quats 
B)  iodophors 
C)  ethylene oxide 
D)  chloramines 
E)  70% alcohol

Question 19

Which of the following is used for microbial control in fresh fruits and vegetables?

Accepted Answer

A)  ultraviolet light 
B)  electron beams 
C)  microwaves 
D)  X rays 
E)  gamma rays 
A)  ultraviolet light 
B)  electron beams 
C)  microwaves 
D)  X rays 
E)  gamma rays

Question 20

The use of high levels of salt or sugar in the preservation of foods relies on the concept of .

Accepted Answer

The answer of The use of high levels of salt...

Exam 9: Controlling Microbial Growth in the Environment

Which of the following is an example of sanitization?

Ninety percent alcohol is more effective at denaturing protein than 100% alcohol.

Hypertonic environments inactivate microbial enzymes by removing water from cells.

Which of the following is a true statement concerning microbial death?

Which of the following is a sterilizing agent?

All of the following are characteristics of aldehydes EXCEPT:

The amount of time needed to sterilize materials using moist heat is (greater than/less than) the time needed to sterilize using dry heat.

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

By themselves, soaps have only degerming activity, not antimicrobial activity.

Which of the following is a target of pasteurization?

All of the following are associated with filtration EXCEPT:

is the process of freeze- drying microbes to preserve them.

Antimicrobial agents that interfere with nucleic acids also stop protein synthesis because

An environment may contain some microbes and still be considered sterile under certain conditions.

Which of the following has been incorporated into consumer products such as diapers and cutting boards?

The lowest temperature that kills all cells in a broth in 10 minutes is known as the .

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

Which of the following antimicrobial agents is the most toxic to humans?

Which of the following is used for microbial control in fresh fruits and vegetables?

The use of high levels of salt or sugar in the preservation of foods relies on the concept of .

A Brief History of Microbiology

The Chemistry of Microbiology

Cell Structure and Function

Microscopy, Staining, and Classification

Microbial Metabolism

Microbial Nutrition and Growth

Microbial Genetics

Recombinant Dna Technology

Controlling Microbial Growth in the Body: Antimicrobial Drugs

Characterizing and Classifying Prokaryotes

Characterizing and Classifying Eukaryotes

Characterizing and Classifying Viruses, Viroids, and Prions

Infection, Infectious Diseases, and Epidemiology

Innate Immunity

Adaptive Immunity

Immunization and Immune Testing

Aids and Other Immune Disorders

Microbial Diseases of the Skin and Wounds

Microbial Diseases of the Nervous System and Eyes

Microbial Cardiovascular and Systemic Diseases

Microbial Diseases of the Respiratory System

Microbial Diseases of the Digestive System

Microbial Diseases of the Urinary and Reproductive Systems

Applied and Environmental Microbiology

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