What is the role of DNA helicase in DNA replication?
A) It unwinds the DNA prior to replication.
B) It synthesizes the primer.
C) It adds nucleotides to the growing DNA chain.
D) It links Okazaki fragments together.
E) It adds repetitive sequences to the ends of chromosomes.

Question

Quizplus · Accepted Answer

DNA helicase is responsible for unwinding the double-stranded DNA molecule by breaking the hydrogen bonds between the nucleotide base pairs. This separation of the two strands creates the replication fork, which is the site where new nucleotides are added to each single strand, forming two identical daughter molecules.

What Is the Role of DNA Helicase in DNA Replication