L19: Virus Diversity Flashcards
1
Q
What is a virus?
A
An infectious agent. Always needs a host cell
2
Q
What is the viral cycle?
A
3
Q
What are DNA viruses?
A
4
Q
How many classes of DNA viruses are there?
A
4?
5
Q
How many classes of Viruses are there?
A
7?
6
Q
What are RNA viruses?
A
7
Q
How many classes of RNA viruses are there?
A
8
Q
Where does the genetic diversity in viruses come from?
A
9
Q
What are the three principle mechanismsH of genetic variation?
A
10
Q
What is polymerase fidelity virus genetic diversity?
A
11
Q
At what stage does recombination occur in DNA virus and RNA virus genomes?
A
Replication
12
Q
What is homologous recombination?
A
13
Q
What is template switching in virus genomes?
A
14
Q
How does recombination occur in DNA viruses?
A
15
Q
What is sequence homology?
A
16
Q
What is reassortment in RNA Viruses?
A
17
Q
What is an antigentic shift?
A
18
Q
What is antigenetic drift?
A
