Question

starch grains turn blue after stainning in iodine solution .give reason​

Answer 1

Explanation:

Plants store glucose as the polysaccharide starch; the cereal grains (wheat, rice, corn, oats, barley) as well as tubers such as potatoes are also rich in starch. Starch can be separated into two fractions--amylose and amylopectin. Natural starches are mixtures of amylose (10-20%) and amylopectin (80-90%).

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Answer 2

Answer:

amylose in starch is responsible for the formation of a deep blue colour in the presence of iodine the iodine molecules slips inside of amylose coil . this makes a lines triiodie ion complex with is soluble that slips into the coil of starch causing an intense blue - black colour

this is the reason that starch grains turns blue after staining in iodine solution

Explanation:

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