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NEET 2023, Biology Q22: Recombinant DNA Technology

NEET2023Biology
Q.

During the purification process for recombinant DNA technology, addition of chilled ethanol precipitates out:

  1. A

    RNA

  2. B

    DNA

  3. C

    Histones

  4. D

    Polysaccharides

Solution

After lysing the cell and removing proteins (with proteases) and RNA (with RNase), the cleaned-up DNA is precipitated out as fine threads by adding chilled ethanol. The DNA appears as collectable strands while smaller contaminants stay in solution.

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