What is the viral envelope, and what does the presence (or absence) of it tell you about the type of virus? The viral envelope surrounds the viral capsid and serves as an additional barrier to the external environment. The majority of animal viruses are enveloped where as plant or bacteria infect...
4. Replication: The viral genome provides the 'blueprint' to make copies
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of itself
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5. Exit: New viruses are produced and leave the cell
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6. New infection: Newly produced viruses leave the host cell and go on
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to infect new cells. The process outlined above now restarts.
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What is a bacteriophage?
_;- _;- _;- _;-_;- _;- A virus that infects bacteria
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, What structural aspects make bacteriophages distinct from viruses that
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infect either animals or plants?
_;- They have an icosahedral capsid
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head and a helical tail.
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Which viral replicative process results in the destruction of the host cell?
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_;- The lytic replication cycle
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Describe the appearance of a bacterial culture infected with virus at the
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time of infection versus later once viral replication is occurring at a high
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rate. It turns from a turbid to clear, the bacterial cell numbers
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decrease due to lysis and the media becomes clearer.
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To what family of viruses does rubella come from and how is it
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transmitted? Rubella comes from Togaviridae and it is transmitted
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by air-borne particles.
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What is the common name for rubeola, and is it a DNA or RNA virus?
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It is commonly known as measles and belongs to viruses called
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Paramyxovirus. It is a RNA. _;- _;- _;- _;-
What disease state emerges as a viral reactivation of a prior infection
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with the varicella virus?
_;- Shingles, also known as Herpes zoster, is
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due to the reactivation of the varicella-zoster virus (VZV). Because VZV
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lies dormant in inactive nerve cells, its reactivation typically results in
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painful blisters. However, unlike the initial chickenpox rash, the blisters
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are localized and limited to small areas.
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