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14 terms

Intro to Viruses

STUDY
PLAY
size of virus
much smaller than cell
What is a virus?
in general, viruses are obligate intracellular parasites (have to do it; life in a cell is harmful to cell; if not in a cell, virus tries to find a cell by whatever means to use, or abuse)
genome
breaks down into DNA/RNA and could contain either single/double strand (lots of variation)
capsid
coat on virus and made of protein
phospholipid bilayer
some viruses have envelope on top of coating
bacterio phage
sterotypical virus; viruses are different, but they do all have a genome and coat
Lytic Cycle
where virus hijacks energy from cell by attaching, entry, synthesis, assembly, release
Attachment
virus attaches and pierces onto cell
Entry
virus pierces into cell and drops [DNA] virus in
Role of restriction enzyme
if cells DNA has special enzyme, it will cut up virus [DNA] before the virus chops up the original DNA
Synthesis
DNA from host cell falls apart; abuses by building with proteins and other resources to make own parts
Result of Lytic Cycle
causes symptoms, which are a lot of dead cells not doing what they're supposed to do
Assembly
viruses self-assemble
Release
cell bursts with newly assembled viruses; then the cycle repeats because the viruses will now do the same thing to another cell