This preview shows pages 1–2. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: ISB 202 10-23-08 Lack of sensitivity to antibiotics is a big problem Virus-non-cellular, non-living infectious particle o Has the following parts : A. nucleic acid (either DNA or RNA) Single or double strand of either (not both) B. usually coated with protein (may be naked) C. may be surrounded by an envelope o It cannot multiply by itself It must get a host cell to do it. Fortunately for us it requires a specific type of cell found only in certain species o Virus cannot be killed but can be deactivated o All of viruses parts are proteins o Where did viruses get that name??? o How do they multiply? 1. Virus attaches to host cell. Inserts DNA or RNA into cell 2. Virus uses host cells machinery to reproduce DNA/RNA and proteins 3. Virus assembles protein coat, DNA/RNA, and attaches protein tails (if part of the virus) o Virus makes enzymes that rupture the cell membrane, and the cell lyses (splits open) o The virus is released o If the virus has an envelope this is when the virus gets it from the host cell o The cells die o This is the lytic pathway of multiplication o There is another way viruses multiply This is the lysogenic pathway of multiplying...
View Full Document
This note was uploaded on 04/21/2011 for the course ISB 202 taught by Professor Johnson during the Fall '08 term at University of Michigan.
- Fall '08