Virophages and Sub-viral Agents

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Questions and Answers

What is the mechanism by which Sputnik virophage reduces the efficiency of mimivirus replication?

  • It degrades the mimivirus genome
  • It competes with the mimivirus for host cell resources
  • It inhibits the mimivirus transcription machinery (correct)
  • It hijacks the mimivirus replication machinery

Which of the following is a characteristic of sub-viral agents?

  • They are composed of closed, circular ssRNAs
  • They encode genes for replication
  • They are larger than viruses
  • They require a helper virus for replication (correct)

What is the primary difference between viroids and viruses?

  • Viroids do not encode gene products (correct)
  • Viroids are larger than viruses
  • Viroids are composed of double-stranded DNA
  • Viroids encode gene products

What is the disease caused by prions in sheep?

<p>Scrapie (D)</p> Signup and view all the answers

What is the function of the polymerases encoded by Sputnik virophage?

<p>To replicate the Sputnik virophage genome (A)</p> Signup and view all the answers

What is the term for entities that are smaller than viruses but with virus-like properties?

<p>Sub-viral agents (A)</p> Signup and view all the answers

What is the human disease caused by a satellite virus?

<p>Hepatitis Delta (A)</p> Signup and view all the answers

What is the role of the host cell DNA-dependent RNA polymerase in the replication of viroids?

<p>It is necessary for the replication of viroid RNA (A)</p> Signup and view all the answers

Which of the following is a characteristic shared by both viruses and sub-viral agents?

<p>The presence of virus-like properties (D)</p> Signup and view all the answers

What is the reason why Sputnik virophage cannot replicate on its own?

<p>It lacks the necessary genes for replication (B)</p> Signup and view all the answers

What is the term for the process by which Sputnik virophage reduces the efficiency of mimivirus replication?

<p>Hijacking (B)</p> Signup and view all the answers

Which of the following is an example of a disease caused by a prion?

<p>All of the above (D)</p> Signup and view all the answers

What is the primary function of the genes encoded by Sputnik virophage?

<p>To encode proteins necessary for replication (A)</p> Signup and view all the answers

Which of the following is a characteristic unique to viroids?

<p>The requirement for a host cell DNA-dependent RNA polymerase (C)</p> Signup and view all the answers

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