In molecular genetics, which enzyme unwinds and separates the two complementary strands of the DNA double helix during replication?
Answer and explanation
Correct answer: B. DNA helicase
- Step 1: DNA helicase breaks the hydrogen bonds between nitrogenous base pairs at the replication fork, unwinding the double helix. Answer: DNA helicase. Why not the others: DNA polymerase synthesizes the new complementary strand; DNA ligase seals Okazaki fragments.
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