Question 1

Bacteriophages derive all of the following from the host cell EXCEPT

Accepted Answer

A)  lysozyme.
B)  tRNA.
C)  amino acids.
D)  nucleotides.
E)  ATP.F) A) and C)
G) B) and E)

Question 2

Figure 13.2
 
-Assume a patient has influenza.During which time on the graph in Figure 13.2 would the patient show the symptoms of the illness?

Accepted Answer

A)  a
B)  b
C)  c
D)  d
E)  eF) A) and B)
G) A) and C)

Question 3

An example of a persistent viral infection is

Accepted Answer

A)  Hepatitis A infection.
B)  Influenza.
C)  Herpes Simplex Virus infection.
D)  Human Immunodeficiency Virus infection.
E)  Varicellavirus infection.F) B) and E)
G) A) and C)

Question 4

Compare and contrast the lytic cycle of infection of a DNA virus and an RNA virus.

Accepted Answer

The lytic cycle of infection for DNA vir...

Question 5

________ were first identified in cancer-causing viruses and can induce ________ in infected cells.

Accepted Answer

A)  Herpes viruses;lesions
B)  Oncogenes;transformation
C)  T antigens;lysis
D)  Glycoprotein spikes;syncytia formation
E)  Segmented genomes;reassortmentF) A) and B)
G) B) and E)

Question 6

Some viruses,such as human herpesvirus 1,infect a cell without causing symptoms.These are called

Accepted Answer

A)  latent viruses.
B)  lytic viruses.
C)  phages.
D)  slow viruses.
E)  unconventional viruses.F) A) and B)
G) B) and E)

Question 7

Which of the following is NOT used as a criterion to classify viruses?

Accepted Answer

A)  biochemical tests
B)  morphology
C)  nucleic acid
D)  size
E)  number of capsomeresF) D) and E)
G) C) and D)

Question 8

Which of the following would be the first step in biosynthesis of a virus with a - (minus) strand of RNA?

Accepted Answer

A)  synthesis of DNA from an RNA template
B)  synthesis of double-stranded RNA from an RNA template
C)  synthesis of double-stranded RNA from a DNA template
D)  transcription of mRNA from DNA
E)  synthesis of DNA from a DNA templateF) All of the above
G) A) and E)

Question 9

Continuous cell lines differ from primary cell lines in that

Accepted Answer

A)  viruses can be grown in continuous cell lines.
B)  continuous cell lines always have to be re-isolated from animal tissues.
C)  continuous cell lines are derived from primary cell lines.
D)  continuous cell lines can be maintained through an indefinite number of generations.
E)  continuous cell lines are from human embryos.F) A) and E)
G) C) and E)

Question 10

Figure 13.2
 
-Assume a patient had chickenpox (human herpesvirus 3) as a child.Which line on the graph in Figure 13.2 would show the number of viruses present in this person as a 60-year-old with shingles (human herpesvirus 3) ?

Accepted Answer

A)  a
B)  b
C)  c
D)  d
E)  eF) B) and E)
G) None of the above

Question 11

What contributes to antigenic shift in influenza viruses?

Accepted Answer

A)  worldwide distribution of the virus
B)  a segmented genome
C)  attachment spikes
D)  ease of virus transmission
E)  different virus subtypesF) B) and D)
G) D) and E)

Question 12

Most drugs that interfere with viral multiplication also interfere with host cell function.

Accepted Answer

A) True 
 B)False

Question 13

A viral species is a group of viruses that

Accepted Answer

A)  has the same morphology and nucleic acid.
B)  has the same genetic information and ecological niche.
C)  infects the same cells and cause the same disease.
D)  cannot be defined.E) A) and B)
F) B) and D)

Question 14

Binomial nomenclature is used to name viruses.

Accepted Answer

A) True 
 B)False

Question 15

Shingles is an example of

Accepted Answer

A)  reactivation of latent virus.
B)  lytic virus.
C)  persistent virus.
D)  lysogeny.
E)  transformation.F) A) and D)
G) All of the above

Question 16

Viruses that utilize reverse transcriptase belong to the virus families

Accepted Answer

A)  Retroviridae and Picornaviridae.
B)  Herpesviridae and Retroviridae.
C)  Hepadnaviridae and Retroviridae.
D)  Herpesviridae and Poxviridae.
E)  Rhabdoviridae and Herpesviridae.F) A) and B)
G) C) and D)

Question 17

A feature that may be found in viruses but never in bacteria is

Accepted Answer

A)  the ability to pass through 0.22 micrometer pore filters.
B)  may contain an RNA genome.
C)  they cannot reproduce themselves outside a host.
D)  a sensitivity to antibiotics.
E)  an ability to infect more than one type of host.F) B) and E)
G) D) and E)

Question 18

Oncogenic viruses

Accepted Answer

A)  cause acute infections.
B)  are genetically unstable.
C)  cause tumors to develop.
D)  are lytic viruses that kill the host cell.
E)  have no effect on the host cell.F) None of the above
G) A) and B)

Question 19

Bacteriophage replication differs from animal virus replication because only bacteriophage replication involves

Accepted Answer

A)  adsorption to specific receptors.
B)  assembly of viral components.
C)  replication of viral nucleic acid.
D)  injection of naked nucleic acid into the host cell.
E)  lysis of the host cell.F) D) and E)
G) A) and D)

Question 20

Which of the following places these items in the correct order for DNA-virus replication?
1) Maturation
2) DNA synthesis
3) Transcription
4) Translation

Accepted Answer

A)  1;2;3;4
B)  2;3;4;1
C)  3;4;1;2
D)  4;1;2;3
E)  4;3;2;1F) A) and C)
G) A) and B)

Exam 13: Viruses,viroids,and Prions

Which of the following places these items in the correct order for DNA-virus replication? 1) Maturation 2) DNA synthesis 3) Transcription 4) Translation

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Viruses that utilize reverse transcriptase belong to the virus families

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Which of the following is NOT used as a criterion to classify viruses?

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Compare and contrast the lytic cycle of infection of a DNA virus and an RNA virus.

Correct AnswerAnswered by ExamLex AIThe lytic cycle of infection for DNA vir...View AnswerShow Answer

Bacteriophages derive all of the following from the host cell EXCEPT

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Shingles is an example of

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A feature that may be found in viruses but never in bacteria is

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What contributes to antigenic shift in influenza viruses?

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Bacteriophage replication differs from animal virus replication because only bacteriophage replication involves

Correct AnswerverifiedShow Answer

Some viruses,such as human herpesvirus 1,infect a cell without causing symptoms.These are called

Correct AnswerverifiedShow Answer

________ were first identified in cancer-causing viruses and can induce ________ in infected cells.

Correct AnswerverifiedShow Answer

Binomial nomenclature is used to name viruses.

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Oncogenic viruses

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Which of the following would be the first step in biosynthesis of a virus with a - (minus) strand of RNA?

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Figure 13.2 -Assume a patient has influenza.During which time on the graph in Figure 13.2 would the patient show the symptoms of the illness?

Correct AnswerverifiedShow Answer

A viral species is a group of viruses that

Correct AnswerverifiedShow Answer

Figure 13.2 -Assume a patient had chickenpox (human herpesvirus 3) as a child.Which line on the graph in Figure 13.2 would show the number of viruses present in this person as a 60-year-old with shingles (human herpesvirus 3) ?

Correct AnswerverifiedShow Answer

Continuous cell lines differ from primary cell lines in that

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Most drugs that interfere with viral multiplication also interfere with host cell function.

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An example of a persistent viral infection is

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The lytic cycle of infection for DNA vir...
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were first identified in cancer-causing viruses and can induce in infected cells.

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