In DNA, purine nitrogen bases are

Uracil and guanine

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Guanine and adenine

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Adenine and cytosine

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None of the above

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Solution

The correct option is B Guanine and adenine
In DNA, purine nitrogen bases are guanine and adenine. In DNA, the purines adenine and guanine form hydrogen bonds with their complementary pyrimidines thymine and cytosine, respectively. This is called as a complementary base pairing.
So, the correct answer is option B.

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Similar questions

Statement 1: The four nitrogen bases in a DNA molecule are guanine, thymine adenine, cytosine.

Statement 2: Where adenine and thymine are purines and guanine and cytosine are pyrimidines.

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