Question 1

An infectious protein is a

Accepted Answer

A)   bacteriophage.
B)   prion.
C)   papovavirus.
D)   viroid.
E)   retrovirus.

Question 2

Viruses that utilize reverse transcriptase belong to the virus families

Accepted Answer

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

Question 3

Which of the following statements provides the most significant support for the idea that viruses are nonliving chemicals?

Accepted Answer

A)   They are chemically simple.
B)   They are filterable.
C)   They cause diseases similar to those caused by chemicals.
D)   They cannot reproduce themselves outside a host.
E)   They are not composed of cells.

Question 4

Which of the following statements about viral spikes is FALSE?

Accepted Answer

A)   They bind to receptors on the host cell surface.
B)   They are composed of carbohydrate-protein complexes.
C)   They may cause hemagglutination.
D)   They are found only on nonenveloped viruses.
E)   They are used for attachment.

Question 5

Which of the following is NOT utilized to culture viruses?

Accepted Answer

A)   animal cell cultures
B)   culture media
C)   embryonated eggs
D)   laboratory animals
E)   bacterial cultures

Question 6

Viruses are the only known infectious agents that are obligatory intracellular parasites.

Accepted Answer

A) True 
 B)False

Question 7

The following steps occur during multiplication of herpesviruses. Which is the third step?

Accepted Answer

A)   penetration
B)   attachment
C)   biosynthesis
D)   release
E)   uncoating

Question 8

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 9

Helical and icosahedral are terms used to describe the shapes of a virus envelope.

Accepted Answer

A) True 
 B)False

Question 10

Researchers studying tissues of diseased marine mammals have identified what appear to be viral particles by electron microscopy. Describe three methods you might use to attempt to culture this virus for further study.

Accepted Answer

1. Cell culture: One method to attempt t...

Question 11

Which of the following statements about viruses is FALSE?

Accepted Answer

A)   Viruses contain DNA or RNA but never both.
B)   Viruses contain a protein coat.
C)   Viruses have genes.
D)   Viruses use their own catabolic enzymes.
E)   Viruses use the anabolic machinery of the cell.

Question 12

Positive sense RNA strands of viruses are treated like mRNA inside the host cell.

Accepted Answer

A) True 
 B)False

Question 13

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

Accepted Answer

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

Question 14

Explain the steps involved in bacteriophage DNA entering a bacterial cell.

Accepted Answer

Bacteriophage DNA entering a bacterial c...

Question 15

DNA made from an RNA template will be incorporated into the virus capsid of

Accepted Answer

A)   Hepadnaviridae.
B)   influenzavirus.
C)   bacteriophage families.
D)   Herpesviridae.
E)   Retroviridae.

Question 16

Figure 13.1
 
-The structures illustrated in Figure 13.1 are composed of

Accepted Answer

A)   DNA or RNA.
B)   RNA.
C)   viroids.
D)   Capsomeres.
E)   DNA.

Question 17

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)   e

Question 18

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

Accepted Answer

A)   transcription of mRNA from DNA
B)   synthesis of double-stranded RNA from a DNA template
C)   synthesis of DNA from an RNA template
D)   synthesis of double-stranded RNA from an RNA template
E)   synthesis of DNA from a DNA template

Question 19

Most RNA viruses carry which of the following enzymes?

Accepted Answer

A)   reverse transcriptase
B)   lysozyme
C)   ATP synthase
D)   RNA-dependent RNA polymerase
E)   DNA-dependent DNA polymerase

Question 20

Lysogeny can result in all of the following EXCEPT

Accepted Answer

A)   acquisition of new characteristics by the host cell.
B)   phage conversion.
C)   specialized transduction.
D)   immunity to reinfection by any phage.
E)   immunity to reinfection by the same phage.

Exam 13: Viruses, Viroids, and Prions

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

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The following steps occur during multiplication of herpesviruses. Which is the third step?

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Viruses are the only known infectious agents that are obligatory intracellular parasites.

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DNA made from an RNA template will be incorporated into the virus capsid of

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Researchers studying tissues of diseased marine mammals have identified what appear to be viral particles by electron microscopy. Describe three methods you might use to attempt to culture this virus for further study.

Correct AnswerAnswered by ExamLex AI1. Cell culture: One method to attempt t...View AnswerShow Answer

An infectious protein is a

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Figure 13.1 -The structures illustrated in Figure 13.1 are composed of

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Positive sense RNA strands of viruses are treated like mRNA inside the host cell.

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Which of the following statements about viral spikes is FALSE?

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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?

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Explain the steps involved in bacteriophage DNA entering a bacterial cell.

Correct AnswerAnswered by ExamLex AIBacteriophage DNA entering a bacterial c...View AnswerShow Answer

Which of the following statements provides the most significant support for the idea that viruses are nonliving chemicals?

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Most RNA viruses carry which of the following enzymes?

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Lysogeny can result in all of the following EXCEPT

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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

Which of the following is NOT utilized to culture viruses?

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Helical and icosahedral are terms used to describe the shapes of a virus envelope.

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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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Viruses that utilize reverse transcriptase belong to the virus families

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Which of the following statements about viruses is FALSE?

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1. Cell culture: One method to attempt t...
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Bacteriophage DNA entering a bacterial c...
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The lytic cycle of infection for DNA vir...
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