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Question

DNA differs from RNA in having

A
Uracil
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B
Thymine
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C
Adenine
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D
Guanine
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Solution

The correct option is B Thymine
DNA uses the bases adenine, thymine, cytosine, and guanine; RNA uses adenine, uracil, cytosine, and guanine. Uracil differs from thymine in that it lacks a methyl group on its ring.
So, the correct answer is option B.

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