Question

Why plant don't store glucose as glycogen?

Answer 1

glycogen is much complex molecule than glucose or starch and only human body can use glycogen as we have special organ to break glycogen but plants dont

Answer 2

Food prepared by the plants is stored in the form of starch while all animals,including humans store glucose in the form of glycogen.Glycogen is more highly branched structure than glucose.Glycogen has shorter strands as compared to starch so it can be metabolized very quickly to provide energy to the body.Plants have a much lower metabolic rate than animals and also they don't require sudden burst of energy .So plants store glucose in the form of starch as compared to animals where glycogen is the storage form of carbohydrates.