Nucleoside: A compound consisting of a nitrogenous base attached to a sugar molecule, which is a building block of nucleic acids. Nucleoside analogue: A modified version of a nucleoside that can ...
(Image: Public Domain) Uracil was first discovered in 1900 by the Italian chemist Alberto Ascoli, who isolated it from yeast nucleic acids. However ... occurs when a single nucleotide is changed. In ...
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