Uridine present only in RNA is

Nucleotide

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Purine

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Pyrimidine

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Nucleoside

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Solution

The correct option is D Nucleoside
Nucleoside contains nitrogenous base and sugar. The nitrogenous bases are purines and pyrimidines. The purines are adenine and guanine. The pyrimidines are thymine and cytosine. In RNA, the thymine is replaced by uracil. Uridine is formed by the combination of uracil as a nitrogenous base and ribose sugar. Sugar is attached to the nitrogenous base at first carbon.
So, the correct answer is option D.

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