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Which chemical is used to obtain a precipitate of pure DNA?

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in Biology – Class 12 by (271k points)
Which chemical is used to obtain a precipitate of pure DNA?

(a) Methanol

(b) Ether

(c) HCl

(d) Ethanol

I got this question in an international level competition.

My question comes from Biotechnology in chapter Biotechnology Principles and Processes of Biology – Class 12

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Best answer
The correct answer is (d) Ethanol

Best explanation: Ethanol is used to obtain the precipitate of pure DNA. It’s used in concentrating and de-salting of nucleic acids. It makes the nucleic acid less hydrophilic thus easing their extraction.

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