IntroBio-16-Viruses

IntroBio-16-Viruses - Viruses, Viroids, and Prions 1...

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Viruses, Viroids, and Prions 1
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General Characteristics of Viruses Acellular Chemical infectious particles Sub-microscopic, obligate intracellular parasites 2
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Can infect prokaryotes and eukaryotes Bacteriophages : viruses that infect bacteria 3
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Living characteristics of viruses Replicate at a fast rate, but only in living host cells Can mutate 4
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Nonliving characteristics of viruses Acellular Can not metabolize on their own - replicate using the host cell's metabolic machinery 5
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Produced from the assembly of pre- formed components Have either DNA or RNA but not both 6
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Viral size Much smaller than bacteria Sub- microscopic 7
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Viral structure Virion (intact infectious viral particle) consists of: Genome Capsid Envelope Spikes 8
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Viral genome DNA or RNA (but never both) Single- or double-stranded Circular or linear 9
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Viral shape Helical cylinder Polyhedral - triangular segments arranged in a dome-like shape Complex - irregular shapes or complex structures 11
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Tobacco mosaic virus 13
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Human adenovirus 15
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Avian adenovirus 16
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Complex virus 17
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IntroBio-16-Viruses - Viruses, Viroids, and Prions 1...

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