The number of oxygen's present in a nucleotide formed from a base, that is present only in RNA is .

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Canvas Classes · Accepted Answer

A nucleotide consists of three components: a nitrogenous base, a pentose sugar, and a phosphate group.
The pyrimidine base present only in RNA (and not DNA) is Uracil.
The corresponding nucleotide in RNA formed containing Uracil is Uridine monophosphate (UMP).
Let's determine the molecular formula of UMP () and count the oxygen atoms:
1. Uracil base: Contains 2 oxygen atoms (it is 2,4-dioxopyrimidine).
2. -D-ribose sugar: The formula is . When it forms a nucleoside, it loses one  group via water

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