Week 3 Micro lecture 2 (Viruses)

Question 1

Genetic material and example of a class I virus?

Answer 1

DS DNA

Herpesvirus

Question 2

Genetic material and example of a class II virus?

Answer 2

SS DNA

Parvovirus

Question 3

Genetic material and example of a class III virus?

Answer 3

DS RNA

Reovirus

Question 4

Genetic material and example of a class IV virus?

Answer 4

SS RNA (+)
Picornavirus (Poliovirus)

Question 5

Genetic material and example of a class V virus?

Answer 5

SS RNA (-)
Orthomyxovirus (Influenza)

Question 6

Genetic material and example of a class VI virus?

Answer 6

SS RNA (+)
retrovirus (HIV)

Question 7

Genetic material and example of a class VII virus?

Answer 7

DS DNA (Codes for template RNA that is then reverse transcripted back to DNA)
Hepadna virus (Hep B)

Question 8

What does transformation of virus refer to?

Answer 8

Virus transforms host cell to a tumor cell

Ex. HPV

Question 9

What is temperate virus?

Answer 9

Capable of lysogeny prior to lysis

Ex. Herpes

Question 10

Latent infection

Answer 10

Virus = lysogeny

Question 11

Example of persistent infection

Answer 11

HIV - no lysis stage

Question 12

How does class IV virus transmit genetic material?

Answer 12

Starts with (+) RNA. This is translated by host into proteins which include RdRp capable of synthesizing (-) RNA to serve as a template strand for synthesis of many (+) RNA strands.

Question 13

How does class V virus transmit genetic material?

Answer 13

Starts with (-) RNA as well as viral RdRp from capsid transmitted in host. (+) RNA strand is synthesized by RdRp to make template strand for more (-) RNA.