each polysaccharides tested give different color results with the iodine test why ?
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Answer:
This color test is sensitive enough to detect even minute amounts of starch in solution. The helical structure of amylopectin is disrupted by the branching of the chain, so instead of the deep blue-violet color amylose gives with iodine, amylopectin produces a less intense reddish brown.
Explanation:
The basis for this test is that starch is a coiled polymer of glucose. Iodine interacts with these coiled molecules and becomes bluish black.
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