Virus Lecture Virus The nonliving Undead Virus Characteristics About as big as a protein Basic Virus...

Virus Lecture

Virus

•The nonliving Undead

Virus Characteristics

• About as big as a protein • Basic Virus Anatomy

1. outer protein coat 2. Inner core of nucleic acid

Viruses cannot reproduce on their own

Kinds of Viruses:

• -Viruses cannot be stopped using antibiotics because they are non-living particles!

Virus reproduction

• They cannot reproduce outside of a living cell!• Host specific – Rabbit viruses only infect specific rabbit spp– HIV only infects certain white blood cells

• They cannot reproduce outside of a living cell!

Virus Reproduction

• 1.) attach to host cell• 2.) viral DNA or RNA enters cell • 3.) viral DNA or RNA codes for proteins and

enzymes of the virus

Lytic vs Lysogenic

• Lysogenic – latent period – not actively producing viruses

• Lytic – producing more viruses… like crazy!

Retrovirus

• Viruses that carry RNA• Also have enzyme called reverse transcriptase • RNA DNA, • Than DNA is incorporated into host’s DNA,

Prions… yikes!

•Verdi Is our favorite!•-Jon