Question 1

Some viruses are able to evolve at a fast rate,resulting in implications for

Accepted Answer

A)  developing an effective immune response through vaccination.
B)  treatment of the viral infection.
C)  developing an immune response to the initial infection.
D)  Both a and b are correct implications.
E)  The implications in a,b,and c are all correct.F) D) and E)
G) A) and B)

Question 2

Rhinovirus is a cause of the common cold.What type of infection does it usually cause?

Accepted Answer

A)  acute
B)  latent
C)  persistent
D)  latent or persistent,with equal likelihood
E)  acute or latent,with equal likelihoodF) D) and E)
G) A) and C)

Question 3

If a newly discovered influenza-like virus has 15 neuraminidase proteins on its surface and 23 HA-like molecules,how many new strains could be generated through recombination?

Accepted Answer

A)  38
B)  144
C)  345
D)  1,000
E)  This cannot be calculated due to the randomness of the processF) A) and B)
G) A) and C)

Question 4

Translation inhibition by viruses can involve: (Select all that apply)

Accepted Answer

A)  Cap-snatching from tRNA molecules
B)  Cleavage of eIF-4B
C)  Use of a fragment of eIF-4G to initiate viral mRNA translation
D)  Addition of a cap from host mRNA onto a fully transcriibed viral mRNA
E)  All are correct choicesF) C) and D)
G) All of the above

Question 5

The coronavirus that causes SARS is thought to have evolved from other coronaviruses through this process.

Accepted Answer

A)  spontaneous mutation
B)  recombination
C)  errors in DNA replication
D)  induced mutation
E)  reassortmentF) A) and B)
G) C) and D)

Question 6

Some viruses cause certain types of cancer.

Accepted Answer

A) True 
 B)False  True

Question 7

The human immunodeficiency virus (HIV) can be transmitted by ALL of the following mechanisms EXCEPT:

Accepted Answer

A)  through a mosquito bite.
B)  mother to fetus.
C)  blood transfusion.
D)  sexual contact.
E)  through breast milk.F) A) and B)
G) A) and D)

Question 8

The Ebola virus is spread in several ways.Select all choices which are correct.

Accepted Answer

A)  horizontal
B)  vertical
C)  vector
D)  sexually
E)  zoonoticallyF) A) and E)
G) B) and E)

Question 9

This is an example of a virus known to undergo evolutionary change by reassortment.

Accepted Answer

A)  influenza virus
B)  papilloma virus
C)  hepatitis type B virus
D)  herpes virus
E)  adenovirusF) B) and D)
G) C) and E)

Question 10

A viral infection of short duration is referred to as a(n)________ infection.

Accepted Answer

The answer of A viral infection of short duration is...

Question 11

The Ebola virus is transmitted by a ____________ mechanism.

Accepted Answer

A)  respiratory
B)  zoonotic
C)  fecal-oral
D)  sexual
E)  mechanicalF) B) and E)
G) A) and B)

Question 12

This viral infection results in the continuous production of virions over several years.

Accepted Answer

A)  rhinovirus
B)  myxoma virus
C)  Hepatitis B virus
D)  Ebola virus
E)  influenza virusF) A) and C)
G) C) and E)

Question 13

Viral infections are always acute and cause extensive damage to host cells.

Accepted Answer

A) True 
 B)False

Question 14

Epithelial cancer cells may arise when: (Select all that apply)

Accepted Answer

A)  Adenoviral gene product E6 intereacts with Rb
B)  Adenoviral gene product E7 intereacts with Rb
C)  Adenoviral gene product E1B intereacts with p53
D)  Adenoviral gene product E7 intereacts with p53
E)  Adenoviral gene product E1A intereacts with RbF) A) and B)
G) A) and C)

Question 15

Why do RNA viruses have a high mutation rate?

Accepted Answer

A)  Their RNA is a single stranded molecule.
B)  Their RNA contains unusual nucleotides.
C)  Their RNA-dependent RNA polymerases lack a proofreading function.
D)  Their RNA is quickly degraded by nucleases.
E)  Their RNA is not methylated after synthesis.F) None of the above
G) A) and D)

Question 16

Genes whose alteration can transform normal cells into cancer cells are called ____________ .

Accepted Answer

proto-onco...

Question 17

Oral herpes can be caused by: (Select all that apply)

Accepted Answer

A)  HHV-1
B)  HHV-2
C)  HHV-3
D)  HHV-4
E)  HHV-5F) A) and B)
G) A) and C) A,B

Question 18

Abortive transformation of BRK epithelial cells may arise when:

Accepted Answer

A)  None is a correct choice
B)  Adenoviral gene product E7 intereacts with Rb
C)  Adenoviral gene product E1B intereacts with p53 and Adenoviral gene product E1A intereacts with Rb
D)  Adenoviral gene product E1B intereacts with Rb and Adenoviral gene product E1A intereacts with p53
E)  Adenoviral gene product E1A intereacts with RbF) A) and C)
G) B) and D)

Question 19

The transmission of a virus from mother to fetus is referred to as ___________ transmission.

Accepted Answer

vertical

Question 20

Human epithelial cancer cells may arise when:

Accepted Answer

A)  None is a correct choice
B)  Adenoviral gene product E7 intereacts with Rb
C)  Adenoviral gene product E1B intereacts with p53 and Adenoviral gene product E1A intereacts with Rb
D)  Adenoviral gene product E1B intereacts with Rb and Adenoviral gene product E1A intereacts with p53
E)  Adenoviral gene product E1A intereacts with RbF) All of the above
G) B) and E)

Exam 22: Viral Pathogenesis

Some viruses are able to evolve at a fast rate,resulting in implications for

Correct AnswerverifiedShow Answer

Rhinovirus is a cause of the common cold.What type of infection does it usually cause?

Correct AnswerverifiedShow Answer

If a newly discovered influenza-like virus has 15 neuraminidase proteins on its surface and 23 HA-like molecules,how many new strains could be generated through recombination?

Correct AnswerverifiedShow Answer

Translation inhibition by viruses can involve: (Select all that apply)

Correct AnswerverifiedShow Answer

The coronavirus that causes SARS is thought to have evolved from other coronaviruses through this process.

Correct AnswerverifiedShow Answer

Some viruses cause certain types of cancer.

Correct AnswerverifiedTrue

The human immunodeficiency virus (HIV) can be transmitted by ALL of the following mechanisms EXCEPT:

Correct AnswerverifiedShow Answer

The Ebola virus is spread in several ways.Select all choices which are correct.

Correct AnswerverifiedShow Answer

This is an example of a virus known to undergo evolutionary change by reassortment.

Correct AnswerverifiedShow Answer

A viral infection of short duration is referred to as a(n)________ infection.

Correct AnswerverifiedShow Answer

The Ebola virus is transmitted by a ____________ mechanism.

Correct AnswerverifiedShow Answer

This viral infection results in the continuous production of virions over several years.

Correct AnswerverifiedShow Answer

Viral infections are always acute and cause extensive damage to host cells.

Correct AnswerverifiedShow Answer

Epithelial cancer cells may arise when: (Select all that apply)

Correct AnswerverifiedShow Answer

Why do RNA viruses have a high mutation rate?

Correct AnswerverifiedShow Answer

Genes whose alteration can transform normal cells into cancer cells are called ____________ .

Correct Answerverifiedproto-onco...View AnswerShow Answer

Oral herpes can be caused by: (Select all that apply)

Correct AnswerverifiedA,B

Abortive transformation of BRK epithelial cells may arise when:

Correct AnswerverifiedShow Answer

The transmission of a virus from mother to fetus is referred to as ___________ transmission.

Correct Answerverifiedvertical

Human epithelial cancer cells may arise when:

Correct AnswerverifiedShow Answer

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True

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proto-onco...
View Answer

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A,B

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vertical

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