(i) Write the name of two monosaccharides obtained on hydrolysis of lactose sugar.

(ii) Why Vitamin C cannot be stored in our body?

(iii) What is the difference between a nucleoside and nucleotide?


(i) Upon hydrolysis, lactose produces one molecule of D-glucose and one molecule of D-galactose..

(ii) Vitamin C is water-soluble in nature. It cannot be stored in the human body as it repeatedly gets eliminated through urine.

(iii)A nucleoside is formed by the attachment of purine or pyrimidine base to the 1- position of a pentose sugar.
On the other hand, a nucleotide is a unit formed by the attachment of nucleoside to phosphoric acid at the 5′-position of the sugar moiety.

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