Name the enzyme that facilitates opening of DNA helix during transcription

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Solution : 

Opening of the DNA helix during transcription is facilitated by the RNA Polymerase enzyme, which is a multi-unit enzyme evolved in transcription to synthesize the RNA molecule from the template strand of the DNA molecule.

DNA polymerase – the main function is to duplicate the DNA content of a cell.

DNA ligase – It is a DNA joining and repairing enzyme.

DNA helicase – Separate the two strands of DNA double helix.

So the correct option is (A).

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