Viruses

Viruses - Can only reproduce inside a host cell! Process or...

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Viruses Dead or alive?
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Viral structure Viruses are not cells. Basic structure: Protein coat Nucleic acid core (RNA or DNA) Lipoprotein coat (second coat – only in enveloped viruses)
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Virus Categories DNA viruses – stable, do not mutate rapidly Single-stranded or double-stranded Smallpox, Hepatitis B RNA viruses – mutate rapidly, unstable Single-stranded or double-stranded HIV, Rhinovirus
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Are viruses alive? Only 1 characteristic of life: reproduction
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Unformatted text preview: Can only reproduce inside a host cell! Process or reproduction = lytic cycle Lytic Cycle Virus attaches to host cell’s membrane and injects its nucleic acid into the host cell. The viral nucleic acid takes over protein synthesis, creating new viruses. The host cell bursts, lyses, releasing the newly formed viruses. Release Before attachment Attachment Penetration and uncoating Replication Assembly...
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This note was uploaded on 11/09/2011 for the course BIO 110 taught by Professor Harmon during the Winter '11 term at BYU.

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Viruses - Can only reproduce inside a host cell! Process or...

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