General Properties of Viruses Quiz
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Questions and Answers

What is the size range of viruses?

  • 10 nm to 200 nm
  • 50 nm to 500 nm
  • 100 nm to 400 nm
  • 20 nm to 300 nm (correct)
  • Why are viruses considered obligate intracellular parasites?

  • They have a symbiotic relationship with host cells
  • They have specialized structures for intracellular replication
  • They have the ability to replicate both inside and outside of a cell
  • They lack metabolic properties and cannot replicate outside of a living cell (correct)
  • How are viruses observed?

  • Using a scanning tunneling microscope
  • Under a light microscope
  • Only under an electron microscope (correct)
  • Through naked eye observation
  • What is the primary site of viral replication in smallpox infection?

    <p>Cytoplasm of host cell</p> Signup and view all the answers

    What is the mode of transmission for smallpox virus?

    <p>Person to person contact and saliva droplets in an infected person’s breath</p> Signup and view all the answers

    What is the incubation period for smallpox infection?

    <p>13-14 days</p> Signup and view all the answers

    Where does the smallpox virus migrate to after entering through the upper respiratory tract?

    <p>Local lymph nodes</p> Signup and view all the answers

    Study Notes

    Viruses

    • The size range of viruses is 20-400 nanometers (nm) in diameter.

    Characteristics of Viruses

    • Viruses are considered obligate intracellular parasites because they require a host cell to replicate.

    Observing Viruses

    • Viruses can be observed using electron microscopy.

    Smallpox Infection

    Replication Site

    • The primary site of viral replication in smallpox infection is the lymphoid tissues.

    Transmission

    • The mode of transmission for smallpox virus is through respiratory droplets.

    Incubation Period

    • The incubation period for smallpox infection is around 10-14 days.

    Virus Migration

    • After entering through the upper respiratory tract, the smallpox virus migrates to the local lymph nodes, where it replicates before spreading to other parts of the body.

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    Description

    Test your knowledge on the general properties of viruses, including their obligate intracellular nature, host cell recognition, and size range. Learn about how viruses infect various organisms and the conditions required for their replication.

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