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Acellular Infectious Agents: Viruses, Viroids & Prions quiz #3

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Terms in this set (14)

  • Some viruses, such as human herpesvirus 1, infect a cell without causing symptoms. These are called:

    These are called latent viruses.

  • Which group of organisms are viroids (not viruses) most likely to parasitize?

    Viroids most commonly parasitize plants.

  • Enlist two characteristics that all viruses share.

    All viruses have genetic material and a protein coat.

  • What is the main function of the viral capsid and envelope?

    The capsid and envelope protect the viral genome and aid in host cell attachment.

  • What are the components common to all virions?

    All virions have genetic material and a protein capsid.

  • In which step do bacteriophages and animal viruses not differ significantly?

    Both bacteriophages and animal viruses attach to host cells.

  • Which characteristic of viruses prevents them from being used as evidence to support cell theory?

    Viruses are acellular, so they do not support cell theory.

  • Mad cow disease is caused by which agent?

    Mad cow disease is caused by a prion.

  • What process can viruses carry out?

    Viruses can replicate only inside a host cell.

  • A retrovirus has a genome that consists of:

    A retrovirus has a genome consisting of RNA.

  • What structure is found in viruses but not in cells?

    The protein capsid is found in viruses but not in cells.

  • The nucleocapsid is composed of ______.

    The nucleocapsid is composed of the viral genome and the protein capsid.

  • A prion is best described as ______.

    A prion is a misfolded infectious protein.

  • The nucleocapsid is composed of:

    The nucleocapsid is composed of the viral genome and the protein capsid.