![]() When phosphate group is linked 5’-OH of a nucleoside through phosphoester linkage nucleotide is formed. Uracil is present in RNA at the place of Thymine.Ī nitrogenous base is linked to pentose sugar with N-glycosidic linkage to form to form a nucleoside. There are two types of nitrogenous bases – Purines (Adenine and Guanine), and Pyrimidines (Cytosine, Uracil and Thymine).Ĭytosine is common for both DNA and RNA and Thymine is present in DNA.
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