Question 1

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 2

Which of the following is used to sterilize items that should not, or cannot, be exposed to heat or water?

Accepted Answer

A)  ethylene oxide 
B)  formaldehyde 
C)  hydrogen peroxide 
D)  calcium hypochlorite 
E)  triclosan 
A)  ethylene oxide 
B)  formaldehyde 
C)  hydrogen peroxide 
D)  calcium hypochlorite 
E)  triclosan

Question 3

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

Accepted Answer

A) True 
 B)False

Question 4

The process of incineration is used for

Accepted Answer

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

Question 5

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

Accepted Answer

A) True 
 B)False

Question 6

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 7

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

Accepted Answer

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

Question 8

A chemical agent that dissolves lipids can damage

Accepted Answer

A)  cells. 
B)  bacterial endospores. 
C)  enveloped viruses. 
D)  nonenveloped and enveloped viruses. 
E)  cells and enveloped viruses. 
A)  cells. 
B)  bacterial endospores. 
C)  enveloped viruses. 
D)  nonenveloped and enveloped viruses. 
E)  cells and enveloped viruses.

Question 9

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 10

Desiccation, a time-honored method of preserving food, is effective because the

Accepted Answer

A)  heat of the process kills microbes. 
B)  freezing step of the process kills microbes. 
C)  salt concentration is too low to support metabolic function. 
D)  UV light used in the process of sun drying penetrates effectively. 
E)  water content is too low to support metabolic function. 
A)  heat of the process kills microbes. 
B)  freezing step of the process kills microbes. 
C)  salt concentration is too low to support metabolic function. 
D)  UV light used in the process of sun drying penetrates effectively. 
E)  water content is too low to support metabolic function.

Question 11

Seventy percent alcohol is effective against

Accepted Answer

A)  enveloped viruses. 
B)  nonenveloped viruses. 
C)  bacterial endospores. 
D)  protozoan cysts. 
E)  prions. 
A)  enveloped viruses. 
B)  nonenveloped viruses. 
C)  bacterial endospores. 
D)  protozoan cysts. 
E)  prions.

Question 12

Microbial growth in jellies is inhibited by the (acidic/hypotonic/hypertonic) condition of the food.

Accepted Answer

The answer of Microbial growth in jellies is inhibited by...

Question 13

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 14

Gamma irradiation is effective for sterilization because it

Accepted Answer

A)  damages molecules irreversibly. 
B)  is non-ionizing. 
C)  penetrates well. 
D)  destroys protein function, although DNA is undamaged. 
E)  is penetrating and causes extensive molecular damage. 
A)  damages molecules irreversibly. 
B)  is non-ionizing. 
C)  penetrates well. 
D)  destroys protein function, although DNA is undamaged. 
E)  is penetrating and causes extensive molecular damage.

Question 15

Hydrogen peroxide is an effective

Accepted Answer

A)  sterilizing agent. 
B)  disinfectant. 
C)  antiseptic. 
D)  disinfecting and sterilizing agent. 
E)  antiseptic and disinfectant. 
A)  sterilizing agent. 
B)  disinfectant. 
C)  antiseptic. 
D)  disinfecting and sterilizing agent. 
E)  antiseptic and disinfectant.

Question 16

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 17

Ultraviolet light penetrates (more/less) effectively than gamma rays.

Accepted Answer

The answer of Ultraviolet light penetrates (more/less) effectively than gamma...

Question 18

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

Accepted Answer

Autoclaving, the use of super-heated ste

Question 19

Using an alcohol pad before taking a blood sample is an example of antisepsis.

Accepted Answer

A) True 
 B)False

Question 20

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...

Exam 9: Controlling Microbial Growth in the Environment

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

Which of the following is used to sterilize items that should not, or cannot, be exposed to heat or water?

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

The process of incineration is used for

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

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

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

A chemical agent that dissolves lipids can damage

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

Desiccation, a time-honored method of preserving food, is effective because the

Seventy percent alcohol is effective against

Microbial growth in jellies is inhibited by the (acidic/hypotonic/hypertonic) condition of the food.

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

Gamma irradiation is effective for sterilization because it

Hydrogen peroxide is an effective

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

Ultraviolet light penetrates (more/less) effectively than gamma rays.

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

Using an alcohol pad before taking a blood sample is an example of antisepsis.

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

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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