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Nucleotides are the basic building blocks of nucleic acids- ribonucleic acid (RNA) and deoxyriboneculeic acid (DNA). Nucleosides are glycosylamines consisting of nucleobase bound to a ribose or deoxyribose sugar via a beta-glycosidic linkage. eg. uridine, adenosine, guanosine, thymidine and inosine. Synthetic nucleosides, nucleotides and nucleic acids have found applications in biotechnology, biology and medicine.