Which one of the following statements regarding starch and cellulose is not correct?
- ABoth of them are of plant origin
- BBoth of them are polymers
- CBoth of them give colour with iodineCorrect
- DBoth of them are made up of glucose molecules
Explanation
The correct answer is C because starch and cellulose react differently to iodine. Starch has a coiled, helical structure that can trap iodine molecules, resulting in a characteristic blue black color. In contrast, cellulose has a linear, straight chain structure that does not trap iodine, so it does not change color. The other three statements are correct: both are carbohydrates found in plants, both are complex polymers, and both are composed of glucose monomers.
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