Question 1

Boiling water for 10 minutes is effective in ridding it of

Accepted Answer

A)  bacterial endospores. 
B)  protozoan cysts. 
C)  actively growing bacteria. 
D)  enveloped viruses. 
E)  both growing bacteria and enveloped viruses. 
A)  bacterial endospores. 
B)  protozoan cysts. 
C)  actively growing bacteria. 
D)  enveloped viruses. 
E)  both growing bacteria and enveloped viruses.

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 evaluati

Question 3

Which of the following is the most difficult to inactivate?

Accepted Answer

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

Question 4

Silvadene, a topical treatment for burns, contains 1% silver. What category of chemical control agent is in Silvadene?

Accepted Answer

A)  heavy metals 
B)  halogens 
C)  surfactants 
D)  oxidizing agents 
E)  aldehydes 
A)  heavy metals 
B)  halogens 
C)  surfactants 
D)  oxidizing agents 
E)  aldehydes

Question 5

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

Accepted Answer

The answer of   The antimicrobial chemical pictured above...

Question 6

A stationary broth culture contains 10 billion (1010) cells. The microbial death rate during autoclaving of this spent culture is 1.5 minutes. How long must it be autoclaved to be considered sterile?

Accepted Answer

A)  16.5 minutes 
B)  10 minutes 
C)  20 minutes 
D)  12 minutes 
E)  9 minutes 
A)  16.5 minutes 
B)  10 minutes 
C)  20 minutes 
D)  12 minutes 
E)  9 minutes

Question 7

may be achieved using chlorine dioxide.

Accepted Answer

A)  Sterilization 
B)  Disinfection 
C)  Degerming 
D)  Antisepsis 
E)  Both antisepsis and degerming 
A)  Sterilization 
B)  Disinfection 
C)  Degerming 
D)  Antisepsis 
E)  Both antisepsis and degerming

Question 8

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)  thermal death point 
D)  in- use test 
E)  phenol coefficient 
A)  use- dilution test 
B)  microbial death rate 
C)  thermal death point 
D)  in- use test 
E)  phenol coefficient

Question 9

Which of the following is a target of pasteurization?

Accepted Answer

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

Question 10

Which of the following is an example of sanitization?

Accepted Answer

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

Question 11

Hydrogen peroxide is a(n)

Accepted Answer

A)  antiseptic. 
B)  sterilizing agent. 
C)  disinfecting agent. 
D)  ineffective method of disinfecting. 
E)  disinfecting and sterilizing agent. 
A)  antiseptic. 
B)  sterilizing agent. 
C)  disinfecting agent. 
D)  ineffective method of disinfecting. 
E)  disinfecting and sterilizing agent.

Question 12

The use of lysozyme during the preparation of cheeses and wines is effective in reducing the numbers of

Accepted Answer

A)  fungi. 
B)  prions. 
C)  all microbes. 
D)  viruses. 
E)  bacteria. 
A)  fungi. 
B)  prions. 
C)  all microbes. 
D)  viruses. 
E)  bacteria.

Question 13

Glutaraldehyde is used for

Accepted Answer

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

Question 14

The effectiveness of sterilization procedures is evaluated using (prions/cysts/endospores) because of their resilience.

Accepted Answer

The answer of The effectiveness of sterilization procedures is evaluated...

Question 15

Refrigeration is an effective germicidal method.

Accepted Answer

A) True 
 B)False

Question 16

Which of the following is a sterilizing agent?

Accepted Answer

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

Question 17

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

Accepted Answer

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

Question 18

Slow freezing is more damaging to microbial cells than quick freezing.

Accepted Answer

A) True 
 B)False

Question 19

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

Accepted Answer

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

Question 20

The process of filtration is a(n)

Accepted Answer

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

Exam 9: Controlling Microbial Growth in the Environment

Boiling water for 10 minutes is effective in ridding it of

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

Which of the following is the most difficult to inactivate?

Silvadene, a topical treatment for burns, contains 1% silver. What category of chemical control agent is in Silvadene?

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

A stationary broth culture contains 10 billion (1010) cells. The microbial death rate during autoclaving of this spent culture is 1.5 minutes. How long must it be autoclaved to be considered sterile?

may be achieved using chlorine dioxide.

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 is a target of pasteurization?

Which of the following is an example of sanitization?

Hydrogen peroxide is a(n)

The use of lysozyme during the preparation of cheeses and wines is effective in reducing the numbers of

Glutaraldehyde is used for

The effectiveness of sterilization procedures is evaluated using (prions/cysts/endospores) because of their resilience.

Refrigeration is an effective germicidal method.

Which of the following is a sterilizing agent?

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

Slow freezing is more damaging to microbial cells than quick freezing.

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

The process of filtration is a(n)

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 Disease, 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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