What enzyme unzips the double-stranded DNA helix at the replication fork during DNA replication?
Answer and explanation
Correct answer: D. DNA Helicase
- Step 1: DNA replication requires separating the two antiparallel template strands.
- Step 2: DNA Helicase breaks the hydrogen bonds between complementary base pairs, unwinding the double helix at the replication fork.
Answer
DNA Helicase.
Why not the others: 'DNA Polymerase' synthesizes the new complementary daughter strand by adding nucleotides; 'DNA Ligase' joins Okazaki fragments on the lagging strand; 'RNA Primase' synthesizes short RNA primers.
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