After watching a

(a) Rupali is concerned towards the health of other students and she is caring too.

(b) Starch is polysaccharide component of carbohydrates which is

commonly present in bread.

Note: Polysaccharides are formed when a large number (hundreds to

even thousands) of monosaccharide molecules join together

with the elimination of water molecules.

Starch is the chief food reserve material or storage polysaccharide of plants and is mainly found in seeds, roots, tubers, etc. Wheat, maize, rice, potatoes, barley,bananas are the main source of starch. Starch ocuurs in the form of granules.

(c) The two types of secondary structures of proteins are given below:

(i) α-Helix structure

(ii) β-pleated sheet structure or simple β-structure

(d) The two examples of water soluble vitamins are given below:

(i) Vitamin B₁ (Thiamine)

(ii) Vitamin C (Ascorbic acid)