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Why is that a starch, which is a substance composed of many glucose molecules,is negative in Benedict reagent?

Lena

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Posts: 50

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12 years ago

Why is that a starch, which is a substance composed of many glucose molecules,is negative in Benedict reagent?

My conclusion is that starch is a polysaccharides not a glucose, so it would be hard for Benedict solution to break down the cluster of glucose in starch.

I am not sure about this, so I need to know if I was right or wrong. Please explain why.

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|R2r|

wrote...

#1

12 years ago

Benedict's reagent detects reducing ends of sugars.

Starch is a macromolecule that will only have a few reducing ends at the end of chains, so there is little to detect.

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