Write two main functions of carbohydrate in plants.

Answer

(i) Structural material for plant cell walls. The polysaccharide cellulose acts as the chief structural material of the plant cell walls.
(ii) Reserve food material. The polysaccharde starach is the major reserve food material in the plants. It is stored in seeds and acts as the reserve food material for the tiny plant till is capable of making its own food by photosynthesis.