If purified sample of DNA is kept in water, then the solution becomes _______.

Acidic

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Basic

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Neutral

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No effect

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Solution

The correct option is B Acidic
The phosphate group in the DNA molecule is present as a phosphoric acid molecule that can donate two protons and is negatively charged, thereby imparting acidic nature to DNA.
If one kept purified DNA in water (pH between 6.5 ton8.5), the overall pH of the solution becomes acidic.
But the chance of acid hydrolysis of DNA is high in water which can be prevented by storing DNA into the TE (Tris + EDTA) buffer.
So the correct answer is option A.

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