Virus Structures and Sizes
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Questions and Answers

What is a defining characteristic of an icosahedral virus?

  • Contains an additional covering known as the envelope
  • Solid structure with many geometric sides
  • Consists of 20 triangular faces with 12 apexes (correct)
  • Infects and attacks bacteria

    • Which component defines the overall shape of the nucleocapsid in viruses?

  • Capsid
  • DNA or RNA
  • Spikes
  • Capsomers (correct)

    • What distinguishes an enveloped virus from a non-enveloped virus?

  • Possesses an additional covering called the envelope (correct)
  • Consists of capsomers
  • Contains DNA or RNA
  • Replicates its own DNA

    • What is a bacteriophage primarily known for?

    <p>Infecting and attacking bacteria</p> Signup and view all the answers

    What is the replication process for double-stranded DNA viruses in a host cell?

    <p>Opening of a replication bubble for DNA replication</p> Signup and view all the answers

    Which type of virus must direct the synthesis of its own DNA-dependent DNA polymerase?

    <p><strong>DNA</strong> viruses</p> Signup and view all the answers

    What is the role of spikes in enveloped viruses?

    <p><strong>Proteins</strong> inserted into the envelope for attachment</p> Signup and view all the answers

    What distinguishes a complex virus from a simple virus in terms of polymerase usage?

    <p><strong>Complex</strong> viruses use host cell polymerase, while <strong>simple</strong> viruses use viral-coded polymerase.</p> Signup and view all the answers

    What is the primary function of the capsid in a virus?

    <p><strong>Protection</strong> of the genetic material inside</p> Signup and view all the answers

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