Which of the following nucleotide bases is found only in RNA, not in DNA?
A
Guanine
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B
Adenine
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C
Thymine
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D
Uracil
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Solution
The correct option is B Uracil The nucleotide bases of DNA are adenine, guanine, thymine and cytosine; whereas the nucleotide bases of RNA are guanine, thymine, cytosine and uracil.