1.

Both sucrose and lactose possess the same molecular formula, but sucrose is a non-reducing sugar and lactose is a reducing sugar. Why?

Answer»

Solution :In sucrose, HEMIACETAL HYDROXYL groups of GLUCOSE and fructose are involved in the GLYCOSIDIC LINKAGE. Hence sucrose is a non-reducing sugar. In lactose, hemiacetal hydroxy groups of galactose involved in the glycosidic linkage but of glucose not involved in glycosidic linkage. Hence lactose is a reducing sugar.


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