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Acellular Infectious Agents: Viruses, Viroids & Prions quiz #2

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Terms in this set (12)

  • What components can be found in a bacteriophage?

    A bacteriophage contains genetic material and a protein capsid.

  • Are viruses alive?

    No, viruses are not alive because they are not made of cells.

  • Are viruses living?

    No, viruses are considered nonliving because they lack cellular structure.

  • Which statement best describes how a virus replicates?

    A virus replicates by infecting a host cell and using the host's machinery to produce new viral particles.

  • What are the three main criteria used to classify viruses?

    Viruses are classified by their genetic material, shape, and presence or absence of an envelope.

  • Why do viruses not fit easily into the broadest taxonomic category?

    Viruses do not fit easily into taxonomy because they are acellular and not considered living organisms.

  • Which viral type enters animal cells via fusion with the animal cell membrane?

    Enveloped viruses enter animal cells via fusion with the cell membrane.

  • What is not a typical sign of virus activity on a system?

    In biology, a lack of symptoms is not a typical sign of viral activity.

  • Which component of a virus is lacking in a cell?

    Cells lack a viral capsid.

  • What is an example of a complex virus?

    A bacteriophage is an example of a complex virus.

  • Which component of a virus is injected into a cell?

    The viral genetic material (DNA or RNA) is injected into the host cell.

  • Viral growth in bird embryos can cause discrete, opaque spots in the embryonic membranes called:

    These spots are called pocks.