Lysogenic Infection

Question 1

How does Lysogenic differ from Lytic?

Answer 1

Lysogenic virus does not REPRODUCE and it does not kill its host cell (at least not right away)

Question 2

What are the 5 stages of the Lysogenic infection?

Answer 2

1. Attachment
2. Injection
3. Integration
4. Cell multiplication
5. Enters Lytic Cycle (when triggered)

Question 3

What happens once the viral DNA has entered the host cell?

Answer 3

It remains a part of the host cell for many generations

-called PROPHAGE

Question 4

What happens during the prophage activity?

Answer 4

1. virus can not stay in this stage forever
2. DNA of the prophage will become active and remove itself from the DNA of the host cell
3. It will then direct the synthesis of new virus particles

Lysogenic can turn into Lytic

Question 5

What are 2 Factors that can activate the virus from its Prophage stage?

Answer 5

1. Sudden changes in temp

2. Availability of nutrients

Question 6

What are Retroviruses

Answer 6

they contain RNA as their genetic information

Question 7

What happens when retroviruses infect a host cell?

Answer 7

Produce DNA copy of their RNA genes
RNA –> DNA
works backwards

DNA like prophage, is inserted into the DNA of the host cell

Question 8

AIDS is caused by what?

Answer 8

Retrovirus called HIV