Question 1

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 2

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

Accepted Answer

Bacteriophage DNA entering a bacterial c...

Question 3

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 4

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 5

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 6

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 7

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 8

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

Accepted Answer

A) True 
 B)False

Question 9

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 10

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 11

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 12

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 13

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

Accepted Answer

A) True 
 B)False

Question 14

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 15

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 16

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 17

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

Accepted Answer

A) True 
 B)False

Question 18

An infectious protein is a

Accepted Answer

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

Question 19

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 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

Most RNA viruses carry which of the following enzymes?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Lysogeny can result in all of the following EXCEPT

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Viruses that utilize reverse transcriptase belong to the virus families

Correct AnswerverifiedShow Answer

Which of the following statements about viral spikes is FALSE?

Correct AnswerverifiedShow Answer

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

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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 is NOT utilized to culture viruses?

Correct AnswerverifiedShow Answer

Which of the following statements about viruses is FALSE?

Correct AnswerverifiedShow Answer

An infectious protein is a

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
Answered by ExamLex AI
The lytic cycle of infection for DNA vir...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
Answered by ExamLex AI
1. Cell culture: One method to attempt t...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
Answered by ExamLex AI
Bacteriophage DNA entering a bacterial c...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified