What is the final step in purifying DNA from the mixture of released macromolecules?

What is the final step in purifying DNA from the mixture of released macromolecules?
  1. Treatment with ribonuclease
  2. Treatment with protease
  3. Addition of chilled ethanol
  4. Treatment with cellulase

Solution

The final step in purifying DNA from the mixture of released macromolecules is the addition of chilled ethanol, which causes the purified DNA to precipitate out and collect as fine threads in the suspension.

Asked in: NCERT

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