BIO 1030 Lecture Notes - Lecture 35: Reverse Transcriptase, Cell Membrane, Causative

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BIO 1030 Lecture 35
Lytic cycle
oViruses takes over immediately
oBacteria dies immediately after virus release
o5 stages
Attachment
Virus has to attach to the surface of the cell
Penetration
Virus has to release its genetic material into the cell
Biosynthesis
Cell will produce copies of the viral genes and proteins
Maturation
Viral components are assembled
Release
New viruses leave host cell
Lysogenic cycle
oPhage lies latent until triggered to enter lytic cycle
oBacteria does not die until phage enters lytic cycle
oAfter attachment and penetration, phage integrates into host chromosome as a
prophage
oTrigger causes phage to enter lytic cycle with biosynthesis, maturation, and
release.
Plant viruses
oTend to enter through damaged tissues
oMove through plasmodesmata
oTobacco mosaic virus is a common virus
oUntil recently, the only way to control viruses was to destroy symptomatic plants
and control insect vector
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