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Fundamentals of Molecular Virology Study Set 1

Biology

Quiz 28 :

Retroviruses

Quiz 28 :

Retroviruses

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Which of the following describes the first step in the replication cycle of retroviruses?
Free
Multiple Choice
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Answer:

E

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Which of the following describes the phenomenon of promoter occlusion seen in retroviruses?
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Multiple Choice
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Answer:

A

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Important discoveries about retroviruses were responsible for Nobel Prizes awarded to all of the following scientists EXCEPT:
Free
Multiple Choice
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Answer:

A

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Which of the following is a description of the long terminal repeats found in retroviruses?
Multiple Choice
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All of the following are distinct features of the reverse transcription process,used by retroviruses to convert their ssRNA genome into a dsDNA provirus,EXCEPT…
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The Gag and Pol proteins are coded for in two different reading frames in the avian retroviruses.Which of the following mechanisms is used to produce the Pol proteins?
Multiple Choice
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Which of the following statements about the integration of the retrovirus provirus into the host genome is FALSE?
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Which of the following primarily determines the species and type of cell infected by a specific retrovirus?
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Most retroviruses cause cancers in their animal hosts.
True False
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Which of the following determines the level of viral mRNAs produced from the integrated provirus in retrovirus infected cells?
Multiple Choice
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Nontransforming retroviruses can cause an infected cell to become tumorigenic by doing which of the following?
Multiple Choice
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Most retroviruses,with the exception of lentiviruses,can only infect cells that are actively dividing.Which of the following explains the primary reason for this?
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Which of the following statements about acute transforming retroviruses is TRUE?
Multiple Choice
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The viruses in the gammaretrovirus genus use which of the following mechanisms to synthesize the proteins from the pol gene?
Multiple Choice
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Retroviruses package a positive ssRNA genome,which resembles an mRNA and is immediately translated upon entry into the host cell.
True False
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Which of the following ensures that the Pol protein is packaged into the virions of retroviruses during assembly?
Multiple Choice
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All of the following features are associated with the incoming RNA genomes of retroviruses EXCEPT:
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The reverse transcriptase enzyme of retroviruses includes between 1 and 10 mistakes when it copies the viral genome into DNA.Which of the following explains why?
Multiple Choice
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What is the enzymatic function of the RNaseH activity of reverse transcriptase?
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Retroviruses use which of the following cellular molecules as the primer for genome replication?
Multiple Choice
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