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OpenStax Microbiology TestBank Chapter 6: Acellular Pathogens
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TESTBANKSELLER.COMOpenStax Microbiology Test Bank
Chapter 6: Acellular Pathogens
Chapter 6: Acellular Pathogens
* = Correct answer
Multiple Choice
1. Which of the following is not a property of a virus?
A. It is an infectious cellular pathogen.*
B. It is an obligate intracellular pathogen.
C. Its genome consists of DNA or RNA.
D. Its genome is surrounded by a protein capsid.
Difficulty: Easy
ASM Standard: 10, 13
2. Which of the following is the scientist responsible for first discovering viruses (specifically,
tobacco mosaic virus)?
A. Dimitri Ivanovski*
B. Edward Jenner
C. Henrietta Lacks
D. Stanley Prusiner
Difficulty: Easy
ASM Standard: N/A TESTBANKSELLER.COM
3. The protein subunits that surround the nucleic acid of a virus are known as which of the
following?
A. amino acids
B. capsomeres*
C. chromatins
D. telomeres
Difficulty: Easy
ASM Standard: N/A
4. Arthropods typically serve as which mechanism of transmission for viruses?
A. biological vector*
B. fomite
C. mechanical vector
D. both as fomites and as vectors
Difficulty: Medium
ASM Standard: 10, 13, 23
5. Which unit of length best describes the average size of a virion?
A. mm
Page 1 of 16
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OpenStax Microbiology Test Bank
Chapter 6: Acellular Pathogens
B. µm
C. nm*
D. pm
Difficulty: Easy
ASM Standard: 6
6. Viruses can be visualized using which method?
A. compound light microscope
B. electron microscope*
C. the naked eye
D. ultraviolet rays
Difficulty: Easy
ASM Standard: 6, 32, 36
7. The Baltimore Classification system describes viruses according to which characteristic?
A. capsid shape
B. host-cell susceptibility
C. the presence or absence of an envelope
D. the viral genome*
Difficulty: Easy
ASM Standard: 10 TESTBANKSELLER.COM
8. Which of the following properly lists (in order) the steps of viral replication?
A. Attachment → Lysis → Penetration → Biosynthesis → Maturation
B. Attachment → Penetration → Biosynthesis → Maturation → Lysis *
C. Biosynthesis → Attachment → Penetration → Lysis → Maturation
D. Penetration → Biosynthesis → Lysis → Attachment → Maturation
Difficulty: Easy
ASM Standard: 10
9. In the lysogenic cycle of bacteriophages, the integrated phage genome is known as which of
the following?
A. prophage*
B. provirus
C. virioid
D. virion
Difficulty: Easy
ASM Standard: 10
10. In retroviruses, the integrated phage genome is known as which of the following?
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Chapter 6: Acellular Pathogens
A. prophage
B. provirus*
C. virioid
D. virion
Difficulty: Easy
ASM Standard: 10
11. Which mechanism of horizontal gene transfer relies on the use of viruses?
A. conjugation
B. mutation
C. transduction*
D. transformation
Difficulty: Easy
ASM Standard: 2, 4
12. A bacteriophage infects a host cell and the genome integrates itself into the host
chromosome. Sometime later, the phage is excised along with a short piece of DNA adjacent
to the insertion point. Both the phage DNA and the host DNA are packaged into the same
capsid. The bacteriophage then infects a new cell, delivering both phage and bacterial DNA.
Which process is being described in this scenario?
A. The lysogenic cycle, reactivating as the lytic cycle, followed by generalized transduction
TESTBas
B. The lysogenic cycle, reactivating ANthe
KSlytic
ELLcycle,
ER.followed
COM by specialized transduction*
C. The lytic cycle, reactivating as the lysogenic cycle, followed by generalized transduction
D. The lytic cycle, reactivating as the lysogenic cycle, followed by specialized transduction
Difficulty: Medium
ASM Standard: 2, 4, 10
13. (−)ssRNA is transcribed into (+)ssRNA using which of the following?
A. DNA polymerase encoded by the host cell
B. DNA polymerase encoded by the virus
C. RNA polymerase encoded by the host cell
D. RNA polymerase encoded by the virus*
Difficulty: Easy
ASM Standard: 16, 18
14. Which of the following is a novel enzyme found in retroviruses?
A. forward transcriptase
B. retrotranscriptase
C. reverse transcriptase*
D. Taq polymerase
Difficulty: Easy
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