Mic 541 Exam 4 - Virology - Part 1

58 Questions | Total Attempts: 1773

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Infection Quizzes & Trivia

Covers the first 100 powerpoint slides from the virology lectures for Micro exam #4.


Questions and Answers
  • 1. 
    What is a virion?
    • A. 

      Nucleic acid and surrounding protein shell.

    • B. 

      Major protein component of the shell of the core.

    • C. 

      Single virus particle.

    • D. 

      Membrane surrounding virus core.

  • 2. 
    What is the core?
    • A. 

      Nucleic acid and surrounding protein shell.

    • B. 

      Major protein component of the shell of the core.

    • C. 

      Single virus particle.

    • D. 

      Membrane surrounding virus core.

  • 3. 
    What is a capsid?
    • A. 

      Nucleic acid and surrounding protein shell.

    • B. 

      Single virus particle.

    • C. 

      Major protein component of the shell of the core.

    • D. 

      Membrane surrounding virus core.

  • 4. 
    What is the envelope?
    • A. 

      Nucleic acid and surrounding protein shell.

    • B. 

      Major protein component of the shell of the core.

    • C. 

      Single virus particle.

    • D. 

      Membrane surrounding virus core.

  • 5. 
    Viruses can survive outside of the cell.
    • A. 

      True

    • B. 

      False

  • 6. 
    Which of the following is (are) true concerning viruses?
    • A. 

      May contain DNA as the genetic material.

    • B. 

      May contain RNA as the genetic material.

    • C. 

      Protein shell has an envelope.

    • D. 

      Protein shell does not have an envelope.

    • E. 

      They are the smallest of all self-replicating organisms.

  • 7. 
    Viruses can use which of the following as hosts?
    • A. 

      Bacteria

    • B. 

      Food

    • C. 

      Protozoa

    • D. 

      Plants

    • E. 

      Animals

    • F. 

      Algae

    • G. 

      Fungi

    • H. 

      Molds

  • 8. 
    Viruses can replicate in the:
    • A. 

      Cytoplasm

    • B. 

      Nucleus

    • C. 

      Both cytoplasm and nucleus.

  • 9. 
    Viruses can result in acute death of the host.
    • A. 

      True

    • B. 

      False

  • 10. 
    Match the following terms with the definitions below: Host Range, Susceptibility.1. The capacity of a cell, tissue, or species to support virus replication - qualitatative measurement - number of receptor molecules and ability of host cell to support virus replciation.2. The cells, tissues, species that a virus can productively infect - absolute measurement - determined by receptor availability for virus binding/entry and presence of intracellular cell factors to support virus replication.
    • A. 

      Host Range = 1, Susceptibility = 2.

    • B. 

      Susceptibility = 1, Host Range = 2.

    • C. 

      The definitions provided do not match the terms given.

  • 11. 
    The capsid provides protection against:
    • A. 

      Variations in light.

    • B. 

      Variations in pH.

    • C. 

      Variations in temperature.

    • D. 

      Chemicial composition of the environment.

    • E. 

      Antibody binding.

  • 12. 
    The virus' structure is a:
    • A. 

      Dodecahedron.

    • B. 

      Icosahedron.

    • C. 

      Square.

    • D. 

      Tetrakaidecagon.

    • E. 

      Tetradecagon.

  • 13. 
    The viral envelope can protect against:
    • A. 

      Chemicals.

    • B. 

      Changes in pH.

    • C. 

      Changes in temperature.

    • D. 

      Changes in light.

    • E. 

      Enzymes.

  • 14. 
    How do most viruses acquire membranes/envelopes?
    • A. 

      By the host cell phagocytizing the virus.

    • B. 

      By generating it themselves.

    • C. 

      Through glycosylation.

    • D. 

      By budding through a host cell membrane.

  • 15. 
    Which of the following is true regarding virus binding?
    • A. 

      Requires specific protein receptors.

    • B. 

      Requires specific lipids.

    • C. 

      Requires specific carbohydrates.

    • D. 

      Requires specific vitamins.

    • E. 

      May limit host-cell range AND susceptibility.

    • F. 

      May limit host-cell range but NOT susceptibility.

  • 16. 
    Which type of virus fusion/entry is defined as: internalized into endosome - pH changes causes conformation change in envelope proetin and fusion with endosomal membrane and release into cytosol?
  • 17. 
    What are the possible mechanisms for virus fusion/entry into the host cell?
    • A. 

      Phagocytosis.

    • B. 

      Endocytosis.

    • C. 

      Fusion with nuclear membrane.

    • D. 

      Penetration through plasma membrane.

    • E. 

      Fusion with plasma membrane.

  • 18. 
    Enveloped viruses may enter the host cell through:
    • A. 

      Fusion with plasma membrane.

    • B. 

      Penetration through plasma membrane.

  • 19. 
    Non-enveloped viruses may enter the host cell through:
    • A. 

      Fusion with plasma membrane.

    • B. 

      Penetration through plasma membrane.

  • 20. 
    Replication of RNA viruses typically occurs in the:
    • A. 

      Nucleus

    • B. 

      Golgi

    • C. 

      ER

    • D. 

      Cytoplasm

  • 21. 
    What enzyme is used in the replication of progeny genomic RNA molecules?
    • A. 

      Viral specific RNA ligase

    • B. 

      Viral specific RNA polymerase

    • C. 

      Bacterial specific RNA polymerase

    • D. 

      Bacterial specific DNA ligase

  • 22. 
    Replication of DNA viruses typically occurs in the:
    • A. 

      Golgi

    • B. 

      Cytoplasm

    • C. 

      Nucles

    • D. 

      ER

  • 23. 
    For enveloped viruses, assembly typically occurs at the site of replication.
    • A. 

      True

    • B. 

      False

  • 24. 
    What are the ways the virus undergoes budding/release?
    • A. 

      Lysis.

    • B. 

      Endocytosis.

    • C. 

      Budding out of plasma membrane.

    • D. 

      Fusion with nuclear membrane.

    • E. 

      Exocytosis.

  • 25. 
    The majority of viruses are life-threatening.
    • A. 

      True

    • B. 

      False

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