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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.
DNA is composed of a) Sugars b) Nitrogenous bases DNA expanded stands for De-oxyribo Nucleic Acid. The sugars found in DNA are de-oxy ribose. These are sugars with 5 carbons (pentoses). Unlike the sugars in RNA (ribose) which also have 5 carbons, de-oxy ribose lacks a hydroxyl (-OH) group in the second position.This is considered to be one of the reasons DNA is more stable than RNA.The nitrogenous bases found in DNA are purines (adenine and guanine) and pyrmidines (cytosine and thymine).hese are sugars with 5 carbons (pentoses). Unlike the sugars in RNA (ribose) which also have 5 carbons, de-oxy ribose lacks a hydroxyl (-OH) group in the second position. This is considered to be one of the reasons DNA is more stable than RNA.