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nbose f IC U R t 2-12 Distinctions between the nucleotides of RNA and DNA. A nucleotide of DNA is shown next to a nucleotide of RNA All RNA nucleotides have the sugar nbose (instead oi deoxynbose for DNA). which has a hydroxyl group on carbon 2 (shown in red) In addition, RNA has the pyrtmidir.e base uracil instead of thymine. The three other bases that occur in DNA and RNA are identical.


DNA, however, RNA is typically found in the cell as a single-stranded molecule. If double-stranded RNA helices are formed, they most often are composed of two parts of the same single-stranded RNA molecule.

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