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Disaccharides are carbohydrates those contain two monosaccharides molecules, each in the hemiacetal form, joined together by the elimination of a water between two hydroxyl groups. Dehydration involves the anomeric carbon of one monosaccharide and may or may not involve the anomeric carbon of the other monosaccharide when the hemiacetal hydroxyl group on an anomeric carbon is involved in a dehydration, the resulting product is an acetal (in common) and glycoside (in carbohydrate).
Sucrose is a non-reducing sugar (while its hydrolysis products glucose and fructose are reducing sugars) because :
(a)Glucose has aldehyde and fructose has ketone group and aldehyde is reactive than ketone
(b)It has no free aldehydic or ketonic group. Aldehyde group of glucose component is marked as a glucoside linkage
(c)Surrose solution do not exhibit Mutarotation
(d)None of the above describes above abnormal behaviour

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Important Questions on Biomolecules
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Assertion (A) : Sucrose is a disaccharide and a non-reducing sugar.
Reason (R): Sucrose involves glycosidic linkage between of -glucose and of -fructose.
Choose the most appropriate answer from the options given below :



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Write the products obtained after hydrolysis of lactose.

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(Given: specific rotations of sucrose, maltose, glucose and fructose in aqueous solution are and , respectively)

