Q17 of 71 Page 202

Optical rotations of some compounds along with their structures are given below which of them have D configuration.

(I)



(II)



(III)



All the three monosaccharides have D configuration because the hydroxyl group on the lowest asymmetric carbon is on the right hand side. Thus, option (i) is correct.

Options (ii), (iii) and (iv) are incorrect because all the three monosaccharides have D configuration.

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15

Three cyclic structures of monosaccharides are given below which of these are anomers.

(I)



(II)



(III)



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Structure of a disaccharide formed by glucose and fructose is given below. Identify anomeric carbon atoms in monosaccharide units.


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Three structures are given below in which two glucose units are linked. Which of these linkages between glucose units are between C1 and C4 and which linkages are between C1 and C6?