Question

During lytic cycle, the enzyme endolysin causes breakdown of ...................

• A. bacteriophage DNA
• B. host cell wall
• C. host DNA
• D. virions

Hint:

In the lytic cycle, the enzyme endolysin helps to break down the host cell wall, facilitating the release of new virus particles.

Answer 1

The Correct Option is B

Step 1: Understanding the lytic cycle.
The lytic cycle is a process in which a virus infects a host cell, replicates its DNA, and then causes the cell to break open, releasing new virions. The enzyme endolysin plays a key role in breaking down the host cell wall, allowing the release of the new virions.
Step 2: Analyzing the options.
(A) bacteriophage DNA: Incorrect, endolysin does not break down the bacteriophage DNA.
(B) host cell wall: Correct, endolysin breaks down the host cell wall during the lytic cycle.
(C) host DNA: Incorrect, the host DNA is used to replicate the virus, but it is not broken down by endolysin.
(D) virions: Incorrect, virions are the viral particles, not broken down by endolysin.
Step 3: Conclusion.
The correct answer is (B) host cell wall, as endolysin breaks down the cell wall to release new virions.