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Ribose and Deoxyribose. The 5-carbon sugars ribose and deoxyribose are important components of nucleotides, and are found in RNA and DNA, respectively. The sugars found in nucleic acids are pentose sugars; a pentose sugar has five carbon atoms. A combination of a base and a sugar is called a nucleoside.Ribose, found in RNA, is a normal sugar, with one oxygen atom attached to each carbon atom. Deoxyribose, found in DNA, is a modified sugar, lacking one oxygen atom (hence the name deoxy).he 5-carbon sugars ribose and deoxyribose are important components of nucleotides, and are found in RNA and DNA, respectively.
Ribose sugar: 1. Ribose is the pentose sugar of RNA with five carbons. 2. It has an identical structure to DNA except that there is an hydroxyl (-OH) group instead of hydrogen on carbon atom 2â . 3. Ribose has free âOH groups on carbons 2â, 3â and 5â . 4.The phosphate can attach at any of these three positions.ibose sugar: 1. Ribose is the pentose sugar of RNA with five carbons. 2. It has an identical structure to DNA except that there is an hydroxyl (-OH) group instead of hydrogen on carbon atom 2â . 3. Ribose has free âOH groups on carbons 2â, 3â and 5â . 4. The phosphate can attach at any of these three positions.