The nucleobase present in RNA but not in DNA is:

adenine

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guanine

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cytosine

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uracil

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Solution

The correct option is B uracil
Uracil nucleobase is present in RNA,
Reason:- As the given in the above figure the extra $- C H_{3}$ group more stability to the thymine molecule, DNA is more stable than RNA so thymine is present at the place of uracil.

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Base which is present in RNA but not in DNA is:

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