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Q67. Name the enzyme that facilitates the opening of DNA helix during transcription.

4. RNA polymerase

Various enzymes are required as catalysts during DNA replication in living cells.
✓ DNA-dependent DNA-polymerase - It catalyzes the polymerization of deoxynucleotides on DNA template.
✓ Helicase -It unwinds the DNA strand to form the replication fork.
✓ DNA ligase -It joins the Okazaki fragments which are found on the lagging strand.