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Q.

Which of the following is not present in RNA molecule?

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a

Thymine

b

Ribose

c

Phosphate

d

Uracil

answer is C.

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Detailed Solution

Thymine is easily oxidized. So it is protected from oxygen in the nucleus. Outside of the nucleus, it is quickly destroyed. Uracil is resistant to oxidation and is utilized in RNA, which exists outside of the nucleus.There is no thymine in RNA.

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