What are pentoses? What are the roles of pentoses in DNA and RNA molecules?
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Pentoses are carbohydrates made of five carbons.
The DNA molecule is made of a sequence of molecules called nucleotides. Each nucleotide is formed by the association of one pentose called deoxyribose with a phosphoric acid and a nitrogen-containing base (A, T, C or G). RNA is also formed by a sequence of nucleotides. The RNA nucleotides are made by association of one ribose (a pentose) with one phosphoric acid and one nitrogen-containing base (A, U, C or G).
So pentoses are fundamental components of DNA and RNA.