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The enzyme that unwinds DNA by breaking hydrogen bonds between bases is:

APrimase
BGyrase
CHelicase
DLigase
Answer & Solution
Correct answer: C. Helicase
1. It works at the origin of replication. 2. Helicase opens the helix. 3. Y-shaped replication forks form. _Source: OpenStax Biology 2e, Chapter 14, DNA Structure and Function (CC BY 4.0)._
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