Chapter 7: Microbiology: An Introduction, 13/ 14th edition

Microbiology: An Introduction, 13e (Tortora et al.)
Chapter 7 The Control of Microbial Growth

7.1 Multiple-Choice Questions

1) Which of the following is the best method to sterilize heat-labile solutions?
A) dry heat
B) autoclave
C) membrane filtration
D) pasteurization
E) freezing
Answer: C
Section: 7.
Bloom's Taxonomy: Understanding
ASMcue Outcome: 3.4
Learning Outcome: 7.5

2) Which of the following best describes the pattern of microbial death?
A) The cells in a population die at a constant rate.
B) All the cells in a culture die at once.
C) Not all of the cells in a culture are killed.
D) The pattern varies depending on the antimicrobial agent.
E) The pattern varies depending on the species.
Answer: A
Section: 7.2
Bloom's Taxonomy: Remembering
ASMcue Outcome: 3.4
Learning Outcome: 7.2

3) Which of the following chemical agents is used for sterilization?
A) alcohol
B) phenolics
C) ethylene oxide
D) chlorine
E) soap
Answer: C
Section: 7.5
Bloom's Taxonomy: Remembering
ASMcue Outcome: 3.4
Learning Outcome: 7.9




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,4) Which of the following substances is used for surgical hand scrubs?
A) phenol
B) chlorine bleach
C) chlorhexidine
D) soap
E) glutaraldehyde
Answer: C
Section: 7.5
Bloom's Taxonomy: Remembering
ASMcue Outcome: 3.4
Learning Outcome: 7.9

5) Which of the following pairs of terms is mismatched?
A) bacteriostatic – kills vegetative bacterial cells
B) germicide – kills microbes
C) virucide – inactivates viruses
D) sterilant – destroys all living microorganisms
E) fungicide – kills yeasts and molds
Answer: A
Section: 7.1
Bloom's Taxonomy: Understanding
ASMcue Outcome: 3.4
Learning Outcome: 7.1

6) The most effective form of chlorine is which of the following?
A) hypochlorous acid
B) hydrochloric acid
C) ozone
D) hypochlorite ion
E) chloromine
Answer: A
Section: 7.5
Bloom's Taxonomy: Remembering
ASMcue Outcome: 3.4
Learning Outcome: 7.10

7) Which of the following regarding antimicrobial control agents is FALSE?
A) Contaminating organic debris such as blood or sputum decrease effectiveness.
B) Some agents kill by denaturing microbial cell proteins.
C) Some agents affect microbial cell membranes by dissolving lipids.
D) Silver-impregnated dressings are used for treating antibiotic-resistant bacteria.
E) Alcohols effectively inactivate nonenveloped viruses by attacking lipids.
Answer: E
Section: 7.5
Bloom's Taxonomy: Understanding
ASMcue Outcome: 3.4
Learning Outcome: 7.9
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, 8) Which of the following does NOT achieve sterilization?
A) dry heat
B) pasteurization
C) autoclave
D) supercritical fluids
E) ethylene oxide
Answer: B
Section: 7.4
Bloom's Taxonomy: Remembering
ASMcue Outcome: 3.4
Learning Outcome: 7.4

9) Which of the following is a limitation of the autoclave?
A) It requires an excessively long time to achieve sterilization.
B) It cannot inactivate viruses.
C) It cannot kill endospores.
D) It cannot be used with heat-labile materials.
E) It cannot be used with glassware.
Answer: D
Section: 7.4
Bloom's Taxonomy: Understanding
ASMcue Outcome: 3.4
Learning Outcome: 7.4

10) An agent used to reduce the number of bacteria on a toilet would most accurately be called
a(n)
A) disinfectant.
B) antiseptic.
C) aseptic.
D) fungicide.
E) virucide.
Answer: A
Section: 7.1
Bloom's Taxonomy: Remembering
ASMcue Outcome: 3.4
Learning Outcome: 7.1




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Copyright © 2019 Pearson Education, Inc.