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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.

undine-ff-phosphate

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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