Question:
Which enzyme catalyzes strand separation at the replication fork?
Which enzyme catalyzes strand separation at the replication fork?
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Helicase "unzips" the Genes.
Updated On: May 14, 2026
- Replication protein A
- DNA helicase
- DNA topoisomerase
- DNA polymerase
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Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Step 1: Concept
DNA replication requires the double helix to be unwound to expose the template strands.
Step 2: Meaning
Strand separation involves breaking the hydrogen bonds between complementary nitrogenous bases.
Step 3: Analysis
DNA polymerase synthesizes new strands, and topoisomerases relieve torsional strain. DNA helicase is the specific motor protein that moves along the phosphodiester backbone, unzipping the two strands.
Step 4: Conclusion
DNA helicase is the enzyme responsible for the mechanical separation of DNA strands at the fork. Final Answer: (B)
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