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A unit composed of sugar and nitrogen base linked by glycosidic bond is 1. purine 2. glycoside3. nucleoside4. nucleotide​

Answer»

Correct option isAPurineA unit COMPOSED of SUGAR and NITROGEN BASE linked by the glycosidic bond is nucleoside. The sugars which are PRESENT in the nucleoside are ribose or deoxyribose. The nitrogenous bases are purines and pyrimidines. The phosphate is present as phosphoric acid. The nucleotide is formed by the union of a phosphate group with a nucleoside. A nucleoside, in fact, contains a sugar molecule along with an organic nitrogenous base.So, the correct answer is option A.



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