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The difference in the structure of DNA and RNA is the presence of uracil in RNA instead of thymine in DNA. At molecular level, thymine differs from uracil in having a

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Ketone group

Aldehyde group

Methyl group

Carboxylic group

answer is C.

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Detailed Solution

Why is thymine in DNA and uracil in RNA? - Quora

Both differ by -CH₃ group.

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