Biomolecules and Chemistry in Everyday Life - Result Question 27

####28. The correct statement(s) about the following sugars X and Y is/are:

(2009)

(a) X is a reducing sugar and Y is a non-reducing sugar

(b) X is a non-reducing sugar and Y is a reducing sugar

(c) The glucosidic linkages in X and Y are α and β, respectively

(d) The glucosidic linkages in X and Y are β and α, respectively

Assertion and Reason

Read the following questions and answer as per the direction given below:

(a) Statement I is correct; Statement II is correct; Statement II is a correct explanation of Statement I.

(b) Statement I is correct; Statement II is correct; Statement II is not the correct explanation of Statement I.

(c) Statement I is correct; Statement II is incorrect.

(d) Statement I is incorrect; Statement II is correct.

Show Answer

Solution:

  1. X is acetal, has no free hemiacetal, hence a non-reducing sugar while Y has a free hemiacetal group, it is reducing sugar. Also, glucosidic linkage of X is ’ α ’ while that of Y is β-linkage.


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