Lytic Virus

Question 1

what are the 4 stages of the Lytic virus life cycle?

Answer 1

1. Attachment
2. Entry
3. Replication
4. Release

Question 2

For Lytic virus to reproduce they must

Answer 2

invade or infect a living host cell

Question 3

What happens during the INFECTION stage of Lytic virus life cycle?

Answer 3

(attachment and entry)

FIRST STAGE

1 Virus activated once it comes in CONTACT with correct host cell

2. T4 bacteriophage, molecules on its tail fibers attach to surface of a bacterium
3. Virus then injects its own DNA into the cell

Question 4

Whats happens during the GROWTH stage of Lytic virus life cycle?

Answer 4

SECOND STAGE

1. After entering host cell, DNA of virus goes into action
2. Most cases, host cell can not tell the difference bet. its own DNA and the virus DNA
3. RNA (viral messenger) acts like molecular wreaking crew, shutting down and taking over the infected host cell

Question 5

What happens during the REPLICATION stage of the Lytic virus life cycle?

Answer 5

THIRD STAGE

1. virus takes over, uses materials of host’s cell to make thousands of copies of its own protein coat and DNA
2. Cell host becomes filled with hundreds of viral DNA molecules

EX. T4 bacteriophage infects bacteria in a brief time of only 25 mins.

Question 6

what happens during the REPRODUCTION stage of the Lytic virus life cycle?

Answer 6

FOURTH AND LAST STAGE

1. New virus particles are assembled
2. Infected cells called lyses bursts out
3. Hundreds of new virus particles are released that may infect other host cells
4. Kills the host cell after it leaves