Question 1

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

Accepted Answer

A) True 
 B)False

Question 2

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 3

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

Question 4

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

Accepted Answer

A) True 
 B)False

Question 5

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 
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 6

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 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. 
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

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 9

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.

Question 10

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 11

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 12

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 13

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 
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 14

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 15

Lysozyme is effective against nearly all disease causing agents.

Accepted Answer

A) True 
 B)False

Question 16

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

Question 17

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 18

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

Question 19

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

Accepted Answer

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

Question 20

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).

Exam 9: Controlling Microbial Growth in the Environment

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

Alcohols are used for

The process of filtration is a(n)

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

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

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

What is the method of action of aldehydes?

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

The compound ethylene oxide is used in

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

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

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

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

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

Lysozyme is effective against nearly all disease causing agents.

Antimicrobial agents that damage nucleic acids also affect

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

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

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

Which of the following statements is TRUE of disinfectants?

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

Pathogenic Gram Positive Bacteria

Pathogenic Gram-Negative Cocci and Bacilli

Rickettsias, Chlamydias, Spirochetes, and Vibrios

Pathogenic Fungi

Parasitic Protozoa, Helminths, and Arthropod Vectors

Pathogenic DNA Viruses

Pathogenic RNA Viruses

Applied and Environmental Microbiology

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