Question 1

Binomial nomenclature is used to name viruses.

Accepted Answer

A) True 
 B)False

Question 2

The mechanism whereby an enveloped virus leaves a host cell is called

Accepted Answer

A)   budding.
B)   transduction.
C)   penetration.
D)   abduction.
E)   lysogeny.F) All of the above
G) A) and C)

Question 3

What contributes to antigenic shift in influenza viruses?

Accepted Answer

A)   ease of virus transmission
B)   attachment spikes
C)   worldwide distribution of the virus
D)   a segmented genome
E)   different virus subtypesF) None of the above
G) A) and B)

Question 4

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)   slow viruses.
D)   phages.
E)   unconventional viruses.F) All of the above
G) A) and B)

Question 5

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

Accepted Answer

A)   penetration
B)   attachment
C)   biosynthesis
D)   release
E)   uncoatingF) A) and E)
G) A) and C)

Question 6

How do all viruses differ from bacteria?

Accepted Answer

A)   Viruses are not composed of cells.
B)   Viruses are filterable.
C)   Viruses are obligate intracellular parasites.
D)   Viruses do not have any nucleic acid.
E)   Viruses do not reproduce.F) C) and E)
G) All of the above

Question 7

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.F) C) and D)
G) A) and E)

Question 8

Glycoprotein spikes are found on the capsids of all viruses.

Accepted Answer

A) True 
 B)False

Question 9

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

Accepted Answer

A) True 
 B)False

Question 10

Which of the following is necessary for replication of a prion?

Accepted Answer

A)   RNA
B)   DNA polymerase
C)   lysozyme
D)   PrPSc
E)   DNAF) A) and D)
G) D) and E)

Question 11

The basic mechanism of viral multiplication is similar for all viruses.

Accepted Answer

A) True 
 B)False  True

Question 12

Dogs do not get measles because their cells lack the correct receptor sites for that virus.

Accepted Answer

A) True 
 B)False

Question 13

A persistent infection is one in which

Accepted Answer

A)   the virus remains in equilibrium with the host without causing a disease.
B)   host cells are transformed.
C)   host cells are gradually lysed.
D)   the disease process occurs gradually over a long period.
E)   viral replication is unusually slow.F) C) and D)
G) A) and B)

Question 14

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.F) None of the above
G) C) and D)

Question 15

A segmented genome can result in antigenic shift.

Accepted Answer

A) True 
 B)False  True

Question 16

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)   2; 3; 4; 1
B)   4; 3; 2; 1
C)   3; 4; 1; 2
D)   4; 1; 2; 3
E)   1; 2; 3; 4F) D) and E)
G) None of the above

Question 17

Figure 13.1
 
-In Figure 13.1, which structure is a complex virus?

Accepted Answer

A)   a
B)   b
C)   c
D)   d
E)   All of the structures are complex viruses.F) B) and D)
G) All of the above B

Question 18

A viral species is a group of viruses that

Accepted Answer

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

Question 19

A viroid is a(n)

Accepted Answer

A)   provirus.
B)   infectious protein.
C)   capsid without nucleic acid.
D)   complete, infectious virus particle.
E)   infectious piece of RNA without a capsid.F) None of the above
G) A) and B)

Question 20

Continuous cell lines differ from primary cell lines in that

Accepted Answer

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

Exam 13: Viruses, Viroids, and Prions

Binomial nomenclature is used to name viruses.

Correct AnswerverifiedShow Answer

The mechanism whereby an enveloped virus leaves a host cell is called

Correct AnswerverifiedShow Answer

What contributes to antigenic shift in influenza viruses?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

How do all viruses differ from bacteria?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Glycoprotein spikes are found on the capsids of all viruses.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following is necessary for replication of a prion?

Correct AnswerverifiedShow Answer

The basic mechanism of viral multiplication is similar for all viruses.

Correct AnswerverifiedTrue

Dogs do not get measles because their cells lack the correct receptor sites for that virus.

Correct AnswerverifiedShow Answer

A persistent infection is one in which

Correct AnswerverifiedShow Answer

Lysogeny can result in all of the following EXCEPT

Correct AnswerverifiedShow Answer

A segmented genome can result in antigenic shift.

Correct AnswerverifiedTrue

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

Correct AnswerverifiedShow Answer

Figure 13.1 -In Figure 13.1, which structure is a complex virus?

Correct AnswerverifiedB

A viral species is a group of viruses that

Correct AnswerverifiedShow Answer

A viroid is a(n)

Correct AnswerverifiedShow Answer

Continuous cell lines differ from primary cell lines in that

Correct AnswerverifiedShow Answer

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True

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True

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B

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