Question

(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?

Answer 1

(i) Glucose and galactose are obtained on the hydrolysis of lactose as shown in the figure. (1) Galactose and (2) Glucose

(ii) Vitamin $C$ cannot be stored in our body as it is soluble in water and excrete out with water. Another example of water-soluble vitamins is vitamin$B$.

(iii) Nucleoside = Ribose sugar+ Base.

& Nucleotide= Ribose sugar + Base+ phosphate.