Question 1

The spores of which of the following microbes are the most resistant to every known sterilization technique?

Accepted Answer

A)  Bacillus stearothermophilus 
B)  Mycobacterium bovis 
C)  Clostridium botulinum 
D)  Neisseria gonorrhoeae 
E)  Pseudomonas aeruginosa 
A)  Bacillus stearothermophilus 
B)  Mycobacterium bovis 
C)  Clostridium botulinum 
D)  Neisseria gonorrhoeae 
E)  Pseudomonas aeruginosa A

Question 2

Concerning alcohol, which of the following statements is false?

Accepted Answer

A)  Isopropanol is a better disinfectant than ethanol. 
B)  One hundred percent alcohol is the most effective form. 
C)  Alcohols have more than one cellular target. 
D)  Alcohols are intermediate- level disinfectants. 
E)  Dissolving another chemical in alcohol is a good way to make it more effective. 
A)  Isopropanol is a better disinfectant than ethanol. 
B)  One hundred percent alcohol is the most effective form. 
C)  Alcohols have more than one cellular target. 
D)  Alcohols are intermediate- level disinfectants. 
E)  Dissolving another chemical in alcohol is a good way to make it more effective. B

Question 3

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

Accepted Answer

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

Question 4

Some sterilization procedures do not kill all the microbes that may be present. Explain how these procedures can still be considered sterilization.

Accepted Answer

Theoretically, sterilization is the comp

Question 5

All of the following are characteristics of an ideal antimicrobial agent EXCEPT:

Accepted Answer

A)  it denatures proteins. 
B)  it acts quickly. 
C)  it is harmless to humans. 
D)  it is stable during storage. 
E)  it is inexpensive. 
A)  it denatures proteins. 
B)  it acts quickly. 
C)  it is harmless to humans. 
D)  it is stable during storage. 
E)  it is inexpensive.

Question 6

Natural antiseptics such as pine or clove oil are examples of antimicrobial compounds called _ .

Accepted Answer

The answer of Natural antiseptics such as pine or clove...

Question 7

is the process of drying foods such as fruits in order to preserve them from microbial growth.

Accepted Answer

The answer of is the process of drying foods such...

Question 8

An instrument that will be used in an invasive medical procedure should be disinfected with a(n)

Accepted Answer

A)  high- level germicide. 
B)  intermediate- level germicide. 
C)  low- level germicide. 
D)  Both A and C are correct. 
E)  A, B, and C are correct. 
A)  high- level germicide. 
B)  intermediate- level germicide. 
C)  low- level germicide. 
D)  Both A and C are correct. 
E)  A, B, and C are correct.

Question 9

Gamma rays and X rays are examples of radiation.

Accepted Answer

The answer of Gamma rays and X rays are examples...

Question 10

All of the following are characteristics of iodophors EXCEPT:

Accepted Answer

A)  betadine is an example. 
B)  they are used as an antiseptic. 
C)  they are halogens. 
D)  they are inorganic molecules. 
E)  they have long- lasting effects. 
A)  betadine is an example. 
B)  they are used as an antiseptic. 
C)  they are halogens. 
D)  they are inorganic molecules. 
E)  they have long- lasting effects.

Question 11

All of the following are characteristics of quaternary ammonium compounds EXCEPT:

Accepted Answer

A)  Zephiran is an example of a quat. 
B)  they are harmless to humans except at high concentrations. 
C)  they are used by Pseudomonas aeruginosa as a nutrient. 
D)  they function by cross- linking proteins. 
E)  they are a type of detergent. 
A)  Zephiran is an example of a quat. 
B)  they are harmless to humans except at high concentrations. 
C)  they are used by Pseudomonas aeruginosa as a nutrient. 
D)  they function by cross- linking proteins. 
E)  they are a type of detergent.

Question 12

Which of the following describes the batch method of pasteurization?

Accepted Answer

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

Question 13

Which of the following is the least resistant to antimicrobial agents?

Accepted Answer

A)  Gram- positive bacteria 
B)  bacterial endospores 
C)  protozoan cysts 
D)  enveloped viruses 
E)  protozoa 
A)  Gram- positive bacteria 
B)  bacterial endospores 
C)  protozoan cysts 
D)  enveloped viruses 
E)  protozoa

Question 14

Human tears contain an antimicrobial enzyme called that digests bacterial cell walls.

Accepted Answer

The answer of Human tears contain an antimicrobial enzyme called...

Question 15

The is the time required to destroy 90% of the microbes in a sample.

Accepted Answer

decimal re

Question 16

All of the following statements concerning radiation as a method of microbial control are true EXCEPT:

Accepted Answer

A)  UV light effectively kills cells but does not penetrate surfaces well. 
B)  electron beams have a lot of energy but do not penetrate substances very well. 
C)  microwaves are valuable in microbial control only when they are used to heat food. 
D)  X rays are the most practical form of ionizing radiation for microbial control. 
E)  gamma rays penetrate substances well but require hours to kill microbes. 
A)  UV light effectively kills cells but does not penetrate surfaces well. 
B)  electron beams have a lot of energy but do not penetrate substances very well. 
C)  microwaves are valuable in microbial control only when they are used to heat food. 
D)  X rays are the most practical form of ionizing radiation for microbial control. 
E)  gamma rays penetrate substances well but require hours to kill microbes.

Question 17

All of the following have denaturing proteins included in their mechanism of action EXCEPT:

Accepted Answer

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

Question 18

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

Accepted Answer

A) True 
 B)False

Question 19

Aseptic means

Accepted Answer

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

Question 20

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

Accepted Answer

A) True 
 B)False

Exam 9: Controlling Microbial Growth in the Environment

The spores of which of the following microbes are the most resistant to every known sterilization technique?

Concerning alcohol, which of the following statements is false?

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

Some sterilization procedures do not kill all the microbes that may be present. Explain how these procedures can still be considered sterilization.

All of the following are characteristics of an ideal antimicrobial agent EXCEPT:

Natural antiseptics such as pine or clove oil are examples of antimicrobial compounds called _ .

is the process of drying foods such as fruits in order to preserve them from microbial growth.

An instrument that will be used in an invasive medical procedure should be disinfected with a(n)

Gamma rays and X rays are examples of radiation.

All of the following are characteristics of iodophors EXCEPT:

All of the following are characteristics of quaternary ammonium compounds EXCEPT:

Which of the following describes the batch method of pasteurization?

Which of the following is the least resistant to antimicrobial agents?

Human tears contain an antimicrobial enzyme called that digests bacterial cell walls.

The is the time required to destroy 90% of the microbes in a sample.

All of the following statements concerning radiation as a method of microbial control are true EXCEPT:

All of the following have denaturing proteins included in their mechanism of action EXCEPT:

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

Aseptic means

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

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

Aids and Other 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 Environmental Microbiology

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