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Why is insert purification done after restriction digestion?

Answer and explanation

Correct answer: To separate the desired insert from other DNA and reaction components

The governing concept is selective recovery of a DNA fragment after enzymatic digestion. A restriction reaction may contain the desired insert, vector fragments, unwanted DNA pieces, enzyme, salts, buffer, and sometimes agarose or other materials after gel extraction. Purification isolates the desired insert and removes substances that could interfere with ligase or transformation. The recovered DNA can then be measured and used in a more controlled ligation reaction. Option A is correct. Purification does not make DNA produce protein, convert it into ethanol, or simply remove colour; options B, C, and D therefore do not describe its molecular purpose.

Related tags

Insert PurificationRestriction DigestionLigationCutting Of DnaProcesses Of Recombinant Dna TechnologyBiotechnologyClass 11 Mcq

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