Intro to Viruses

Created by ranaranarana Plus

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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

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