Question

Given below are two statements, one is labelled as Assertion (A) and other labelled as Reason (R).
Assertion (A): The enzyme helicase is required for DNA replication.
Reason (R): Helicase unwinds the double-stranded DNA molecule by breaking the hydrogen bonds between the base pairs.
In light of the above statements, choose the correct answer from the options given below:

• A. Both (A) and (R) are true and (R) is the correct explanation of (A).
• B. Both (A) and (R) are true but (R) is NOT the correct explanation of (A).
• C. (A) is true but (R) is false.
• D. (A) is false but (R) is true.

Hint:

DNA helicase acts as a molecular zipper, consuming ATP to break the hydrogen bonds between base pairs and unwind the double helix ahead of the replication fork.

Answer 1

The Correct Option is A