alleryStart learning →Why does starch turn blue with iodine?
AIts helices hold iodine molecules
BIt carries many phosphate groups
CIt is made of amino sugars only
DIt has no branches of any kind
Answer & Solution
Correct answer: A. Its helices hold iodine molecules
Starch forms helical secondary structures that trap I2, giving a blue starch-iodine complex.
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