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Question

In disaccharides, if the reducing groups of monosaccharides, i.e., aldehydic or ketonic groups are bonded, these are non-reducing sugars. Which of the following disaccharide is a non-reducing sugar?

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Solution

Answer: (b)

This structure represents sucrose in which αD glucose and βD fructose are attached to each other by C1C2 glycosidic linkage.
Since reducing groups of glucose and fructose are involved in the glycosidic bond formation, this is considered as non-reducing sugar.


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