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The enzyme that unwinds the double helix by breaking hydrogen bonds is:

AHexokinase
BHelicase
CHydrolase
DHistidase
Answer & Solution
Correct answer: B. Helicase
1. The two strands must separate before copying. 2. One enzyme does that unwinding. 3. It is helicase. _Source: OpenStax Biology 2e, Chapter 14, DNA Structure and Function._
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