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15 Cards in this Set
- Front
- Back
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Viruses are...
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non-cellular infectious agents tht infect host cells in a specific manner.
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Are virus in sea water?
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Yes. Very abundant even at 10^6/ml.
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Viruses contain....
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nucleic acids (RNA or DNA; DS or SS), proteins (capsid components + enzymes), and envelope components.
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How are viruses classified?
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Into groups and families based on component differences.
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What are viroids?
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RNA only and infect only plant cells.
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What are virusoids?
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RNA only and infect animal cells but they need to be encapsulated in other viruses.
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What are prions?
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infectious agents that have protein only.
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All viruses are visualized by...
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an electron microscope.
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What is a bacteriphage?
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viruses that infect prokaryotic cells.
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What are capsids made of?
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self-assembling units called protomers
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How many type of capsids are in viruses?
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two. Helical and polyhedral/icosahedral.
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Capsids of helical (filamentous) viruses/phage are as large as _____.
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Nucleic acids.
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What binds to the nucleic acids of the capsids?
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protomers.
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TMV stands for?
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Tobacco mosaic virus
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Influenza virus is a....
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helical virus with an envelope.
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