In DNA molecule, which of the following base pairing is not present?

Cytosine and adenine

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Adenine and thymine

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Adenine and guanine

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Cytosine and thymine

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Solution

The correct options are
B Cytosine and adenine
C Cytosine and thymine
D Adenine and guanine
DNA is a nucleic acid that is composed of nitrogenous bases, sugar, and phosphate. N-bases are adenine, guanine, cytosine, and thymine. However, uracil is present in RNA instead of thymine. In DNA, adenine, and thymine linked with double hydrogen bonding while cytosine and guanine form triple hydrogen bonding.
Hence, the correct answer is option A, option C, and option D.

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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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