DNA viruses Flashcards
What are the 4 different types of DNA viruses?
Single-stranded (ss)
Double-stranded (ds)
Linear
Circular
DNA= types and examples
ds—–> smallpox
ss—>parvovirus(skin lesions)
RNA examples (ss, ds)
SS+—->poliovirus
ss——>Influenza
ds—>Rotavirus
SSR.T—->HIV
RNA viruses
Double-stranded, but more often
single stranded
Negative-sense RNA: must be converted
converted before translation can occur
: carry their own enzymes to create DNA out of RNA
Retroviruses
The nature of the viral replication cycle dictates:
-The way the virus is transmitted
-What it does to the host
-Responses of immune defenses
-Human measures to control viral infection
What are the General phases of the animal viral replication cycle
5 steps
1) Adsorption,
2) penetration & uncoating,
3) synthesis
, 4) Assembly
5) release
What is adsoprtion
– binding of viruses to specific molecules on host cell
genome enters host cell, viral nucleic acid released from capsid
Penetration & Uncoating
Synthesis
viral components are produced
Release
assembled viruses