Question 22.4: The disaccharide cellobiose can be obtained by enzyme-cataly...

Fundamentals of General, Organic, and Biological Chemistry

The disaccharide cellobiose can be obtained by enzyme-catalyzed hydrolysis of cellulose. Do you expect cellobiose to be a reducing or a nonreducing sugar?

ANALYSIS To be a reducing sugar, a disaccharide must contain a hemiacetal group, that is, a carbon bonded to one — OH group and one — OR group. The ring at the right in the structure above has such a group.

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