What is nucleoside ?

What is nucleoside ?
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Answer :

A glycoside compound formed by the addition of one molecule of nitrogen base and one molecule of pentose sugar is called nucleoside. If the base is pyrimidine it is called pyrimidine nucleoside , and if the base is purine it is called purine nucleoside. The pyrimidine nucleoside binds to the glycoside bond with the hydroxyl radical of the carbon 1 of the base nitrogen sugar. But in the purine nucleoside, the 9th nitrogen (not the 1st) of the base is attached to the glycoside bond with the hydroxyl radical of the 1st carbon of the sugar.
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