Question 1

The pH conditions under which a chemical disinfectant is used do not alter its efficacy.

Accepted Answer

A) True 
 B)False

Question 2

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 compl

Question 3

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 4

Boiling water for 10 minutes is effective in ridding it of

Accepted Answer

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

Question 5

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 6

The contents of a bottle labeled "Tincture of iodine" is

Accepted Answer

A)  an alcohol solution of iodine. 
B)  a variety of organic compounds containing iodine. 
C)  also known as betadine. 
D)  a mixture of iodine and chloramine. 
E)  a detergent solution of iodine. 
A)  an alcohol solution of iodine. 
B)  a variety of organic compounds containing iodine. 
C)  also known as betadine. 
D)  a mixture of iodine and chloramine. 
E)  a detergent solution of iodine.

Question 7

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. 
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.

Question 8

Standard pasteurization methods are used to

Accepted Answer

A)  reduce microbes that cause spoilage. 
B)  remove all thermoduric microbes. 
C)  reduce microbes that cause disease. 
D)  remove all microbes. 
E)  reduce microbes that cause disease or spoilage. 
A)  reduce microbes that cause spoilage. 
B)  remove all thermoduric microbes. 
C)  reduce microbes that cause disease. 
D)  remove all microbes. 
E)  reduce microbes that cause disease or spoilage.

Question 9

The deadliest,most contagious microbes are studied under conditions of (BSL-4/BSL-3/BSL-2/BSL-1)containment.

Accepted Answer

The answer of The deadliest,most contagious microbes are studied under...

Question 10

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 11

Compare and contrast the different uses of heat to reduce microbial contamination,including their relative efficacy.

Accepted Answer

Autoclaving,the use of super-heated stea

Question 12

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

Accepted Answer

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

Question 13

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. 
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.

Question 14

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 15

Which of the following describes flash pasteurization?

Accepted Answer

A)  heating at 63°C for 30 minutes 
B)  heating at 72°C for 15 seconds 
C)  heating at 72°C for 15 minutes 
D)  heating at 134°C for one second 
E)  passing liquid through steam at 140°C 
A)  heating at 63°C for 30 minutes 
B)  heating at 72°C for 15 seconds 
C)  heating at 72°C for 15 minutes 
D)  heating at 134°C for one second 
E)  passing liquid through steam at 140°C

Exam 9: Controlling Microbial Growth in the Environment

The pH conditions under which a chemical disinfectant is used do not alter its efficacy.

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.

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

Boiling water for 10 minutes is effective in ridding it of

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

The contents of a bottle labeled "Tincture of iodine" is

Which of the following is an example of pasteurization?

Standard pasteurization methods are used to

The deadliest,most contagious microbes are studied under conditions of (BSL-4/BSL-3/BSL-2/BSL-1)containment.

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

Compare and contrast the different uses of heat to reduce microbial contamination,including their relative efficacy.

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

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

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

Which of the following describes flash pasteurization?

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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