Question

What is the role of Helicase (DnaB) in the process of DNA replication, particularly in relation to double-stranded DNA?

A) Helicase opens double-stranded DNA by breaking the hydrogen bonds between base pairs.
B) Helicase can only unwind DNA that has already been opened by another enzyme (DnaA-ATP).
C) Helicase is responsible for synthesizing new DNA strands.
D) Helicase joins the Okazaki fragments during DNA replication.

Answer:

Answer 1

Helicase opens the double-stranded DNA molecule by breaking the hydrogen bonds between the base pairs during DNA replication.

Step-by-step explanation:

Helicase plays a critical role in the process of DNA replication, particularly in relation to double-stranded DNA. It is responsible for opening the double-stranded DNA molecule by breaking the hydrogen bonds between the base pairs. This action creates a replication bubble and separates the DNA strands at the origin of replication. Helicase works alongside other enzymes like topoisomerase, single-stranded binding proteins, and primase to ensure successful replication of the DNA.