Question 1

Aseptic means

Accepted Answer

A)  sterile. 
B)  free of all microbes. 
C)  clean. 
D)  sanitized. 
E)  free of pathogens. 
A)  sterile. 
B)  free of all microbes. 
C)  clean. 
D)  sanitized. 
E)  free of pathogens.

Question 2

Which of the following procedures is currently the standard test used in the United States for evaluating the efficiency of antiseptics and disinfectants?

Accepted Answer

A)  use-dilution test 
B)  microbial death rate 
C)  in-use test 
D)  Kelsey-Sykes capacity test 
E)  phenol coefficient 
A)  use-dilution test 
B)  microbial death rate 
C)  in-use test 
D)  Kelsey-Sykes capacity test 
E)  phenol coefficient

Question 3

Which of the following can be used to reduce microbes in the air of a patient's room?

Accepted Answer

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

Question 4

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). 
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 5

Lysozyme is effective against nearly all disease causing agents.

Accepted Answer

A) True 
 B)False

Question 6

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

Accepted Answer

Answers will vary.Appropriate controls a

Question 7

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

Question 8

You notice a sign in a public restroom that states "Sanitized for your safety." This means

Accepted Answer

A)  sterilizing chemicals have been used in cleaning. 
B)  antiseptics have been used to clean the area. 
C)  degerming methods only have been used to clean the restroom. 
D)  methods of disinfection that meet minimum standards of microbial removal have been used. 
E)  only "organic" chemicals were used in the cleaning process to reduce microbial numbers. 
A)  sterilizing chemicals have been used in cleaning. 
B)  antiseptics have been used to clean the area. 
C)  degerming methods only have been used to clean the restroom. 
D)  methods of disinfection that meet minimum standards of microbial removal have been used. 
E)  only "organic" chemicals were used in the cleaning process to reduce microbial numbers.

Question 9

What effect do aldehydes have on microbial organisms?

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. 
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 10

Which of the following is the most difficult to inactivate?

Accepted Answer

A)  enveloped viruses 
B)  fungus spores 
C)  bacterial endospores 
D)  nonenveloped viruses 
E)  protozoan cysts 
A)  enveloped viruses 
B)  fungus spores 
C)  bacterial endospores 
D)  nonenveloped viruses 
E)  protozoan cysts

Question 11

Which of the following is NOT a desirable characteristic of an ideal antimicrobial agent?

Accepted Answer

A)  it is inexpensive. 
B)  it is stable during storage. 
C)  it is harmless to humans. 
D)  it only arrests growth of vegetative cells. 
E)  it acts quickly. 
A)  it is inexpensive. 
B)  it is stable during storage. 
C)  it is harmless to humans. 
D)  it only arrests growth of vegetative cells. 
E)  it acts quickly.

Question 12

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

Accepted Answer

A) True 
 B)False

Question 13

An instrument that will come into contact with only the skin of a patient should be disinfected with a(n)

Accepted Answer

A)  high-level germicide. 
B)  low-level germicide. 
C)  intermediate-level germicide. 
D)  degerming agent only. 
E)  germistatic agent only. 
A)  high-level germicide. 
B)  low-level germicide. 
C)  intermediate-level germicide. 
D)  degerming agent only. 
E)  germistatic agent only.

Question 14

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

Accepted Answer

A)  70% alcohol 
B)  ethylene oxide 
C)  quaternary ammonium compounds 
D)  chloramines 
E)  iodophors 
A)  70% alcohol 
B)  ethylene oxide 
C)  quaternary ammonium compounds 
D)  chloramines 
E)  iodophors

Question 15

Alcohols are used for

Accepted Answer

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

Question 16

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

Accepted Answer

A) True 
 B)False

Question 17

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

Question 18

Long-term storage of milk is made possible by ultra-high-temperature (pasteurization/sanitization/sterilization).

Accepted Answer

The answer of Long-term storage of milk is made possible...

Question 19

The microbial death rate is (constant/nonlinear/variable) over time.

Accepted Answer

The answer of The microbial death rate is (constant/nonlinear/variable) over...

Question 20

The compound ethylene oxide is used in

Accepted Answer

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

Exam 9: Controlling Microbial Growth in the Environment

Aseptic means

Which of the following procedures is currently the standard test used in the United States for evaluating the efficiency of antiseptics and disinfectants?

Which of the following can be used to reduce microbes in the air of a patient's room?

Which of the following statements is TRUE of disinfectants?

Lysozyme is effective against nearly all disease causing agents.

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

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

You notice a sign in a public restroom that states "Sanitized for your safety." This means

What effect do aldehydes have on microbial organisms?

Which of the following is the most difficult to inactivate?

Which of the following is NOT a desirable characteristic of an ideal antimicrobial agent?

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

An instrument that will come into contact with only the skin of a patient should be disinfected with a(n)

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

Alcohols are used for

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

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

Long-term storage of milk is made possible by ultra-high-temperature (pasteurization/sanitization/sterilization).

The microbial death rate is (constant/nonlinear/variable) over time.

The compound ethylene oxide is used in

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

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 Industrial Microbiology

Microbial Ecology and Microbiomes

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