Viral Genomes: DNA vs. RNA
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Questions and Answers

What is the defining characteristic used to classify a virus as a DNA virus or an RNA virus?

  • Shape of the virus capsid
  • Presence or absence of an envelope
  • Size of the virus particle
  • Type of nucleic acid in the virus genome (correct)

    • Which of the following is NOT a type of virus genome based on the information provided?

  • Double-stranded DNA
  • Triple-stranded DNA (correct)
  • Single-stranded RNA
  • Double-stranded RNA

    • What is the size range of viruses as mentioned in the text?

  • $100$ nm to $1000$ nm
  • $1$ nm to $1000$ nm
  • $1$ nm to $100$ nm
  • $10$ nm to $900$ nm (correct)

    • Which characteristic makes viruses dependent on a host to live?

    <p>Inability to reproduce outside of a host cell</p> Signup and view all the answers

    What is the main structural component of a virus particle?

    <p>Protein coat (capsid)</p> Signup and view all the answers

    Which type of virus is known to have an envelope surrounding its protein coat?

    <p>Enveloped virus</p> Signup and view all the answers

    Which of the following statements about viruses is TRUE?

    <p>The genetic material of all viruses is made up of RNA</p> Signup and view all the answers

    Which component of the viral envelope membrane is of viral origin?

    <p>Glycoproteins</p> Signup and view all the answers

    Viruses lack which of the following metabolic components?

    <p>Mitochondria</p> Signup and view all the answers

    What is the structure that the arrow is pointing at?

    <p>Capsid</p> Signup and view all the answers

    In viral replication, where does the viral genome go after binding to a host cell?

    <p>Nucleus</p> Signup and view all the answers

    Which type of virus contains a single molecule DNA as its genome?

    <p>Adenoviruses</p> Signup and view all the answers

    Which virus is an example of a double-stranded RNA genome?

    <p>Influenza</p> Signup and view all the answers

    What is the main function of capsids in viruses?

    <p>Enclose the viral genome</p> Signup and view all the answers

    Which type of viruses have an enveloped structure derived partly from host cell membranes?

    <p>Influenza</p> Signup and view all the answers

    Which enzyme does HIV contain that converts RNA back to DNA?

    <p>Reverse transcriptase</p> Signup and view all the answers

    Which virus is an example of a single-stranded RNA genome?

    <p>SARS virus</p> Signup and view all the answers

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