(i) Write the name of two monosaccharides obtained on hydrolysis of lactose sugar.
(iii) Why Vitamin C cannot be stored in our body?
(iii) What is the difference between a nucleoside and nucleotide?

Explanation

(i) D-glucose and D-galactose
(ii) Vitamin C is water soluble and it passes through the body and excreted out through urine. Hence, cannot be stored.
(iii) Nucleoside contains pentose sugar and nitrogenous base whereas, nucleotide contains pentose sugar, nitrogenous base and phosphoric acid group.