Question

how many steps are in lytic cycle of bacteriophage.?​

Answer 1

Answer:

Explanation:Following are the steps of lytic cycle..

1) Attachment:

In this step, the bacteriophage, attaches itself by it's tail to the

cell wall of bacterium (plural-bacteria).

2) Digestion:

In this step, the bacteriophage contains an enzyme called

lysozyme, which digest the cell wall of bacterium (plural-

bacteria).

Thus an opening is formed in the bacterial cell wall.

3) Injection:

The bacteriophage contracts and injects it's DNA through the

opening, inside the host (bacterium), while the protein coat and

tail remain outside.

4) Taking Control:

Inside bacterial cell, the bacteriophage DNA takes over the

biosynthetic machinery of the host (bacterium), to synthesize it's

own DNA and protein molecule.

5) Multiplication:

The bacteriophage multiplies and increases it's number,hence

form a lot of daughter bacteriophages , the daughter

bacteriophages exert pressure on the cell wall of

bacterium.

6) Rupturing:

Finally, the bacterial cell ruptures ( lysis occurs) due to all that pressure caused by daughter bacteriophages and release the

daughter bacteriophages out, which are now ready to attack a new

bacteria and start their lytic cycle, all over again.