Virus (s. Viron)

Virus (s. Viron) - Bi Sci 001 Monday February 1, 1999...

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Bi Sci 001 Monday February 1, 1999 Announcements: If you did not receive an exam score it could be because your social security number was incorrect. If so talk to Mrs. Schlegel. Lecture notes: Virus (s. Viron) A virus is a noncellular infectious agent. Contains: 1. A nucleic acid core (DNA or RNA) surrounded by a protective protein coat called a capsid . 2. Some have a lipid "envelope" outside the capsid. Viruses can only replicate after they have infected a host cell and have taken over the host cell's metabolic machinery. Some viruses have double stranded DNA Some viruses have single stranded DNA Some viruses have single stranded RNA Some viruses have double stranded RNA ! Viruses can infect every type of living cell. There are specific host cells for each virus…Examples: plant viruses, bacteriophages (bacterial viruses), insect viruses, etc. Two Infection Pathways Lytic : 1. Infection of the host cell. 2. Replication of viral DNA/RNA. 3. Synthesis of viral proteins. 4. Assembly of virus. 5. Release of virus: a) lysis of cell (breakage)
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Virus (s. Viron) - Bi Sci 001 Monday February 1, 1999...

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