In molecular genetics, which enzyme unwinds the double helix by breaking hydrogen bonds during DNA replication?
Answer and explanation
Correct answer: B. DNA helicase
- Step 1: Unwinding the parent DNA duplex is catalyzed by helicase. Step 2. Helicase disrupts the hydrogen bonds holding complementary base pairs together. Answer: DNA helicase. Why not the others: DNA ligase joins Okazaki fragments; RNA primase synthesizes primers; DNA polymerase builds the complementary strand.
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