1. Starch,( C6H10O5) N
It is a polymer of a-glucose and a major reserve food in plants. It turns blue with iodine. It is a mixture of two components:
1. Amylose( 20 %), an unbranched water soluble polymer. 2. Amylopectin( 80 %), a branched water insoluble polymer.
Sources of starch are potatoes, wheat, rice, maize, etc.