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What is one role of salt in DNA isolation?

Answer and explanation

Correct answer: Helping DNA precipitation

During DNA isolation, salt helps neutralize the negative charges on DNA’s phosphate backbone. This reduces the DNA’s solubility, especially when cold alcohol is added, so DNA molecules clump together and precipitate visibly. Therefore, option C is correct. Salt does not translate DNA into protein, create DNA from water, or merely remove cell colour.

Related tags

Dna-IsolationSaltDna-PrecipitationBiotechnologyClass 11Isolation Of DnaProcesses Of Recombinant Dna TechnologyClass 11 Mcq

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