Question

Which of the following statement(s) is/are incorrect?
I. Cellulose is a polysaccharide composed of a large number of $\beta$-D-glucose units.
II. $\beta$-D-glucose units in cellulose are joined by $\beta$-glycosidic linkages.
III. Starch is a mixture of amylose and amylopectin.
IV. Amylose is a branched chain polysaccharide.
V. Amylopectin is a linear polysaccharide.

• A. only I
• B. only III
• C. II and III
• D. IV and V

Answer 1

The correct option is D IV and V

Statements I to III are correct.
Cellulose is a polysaccharide composed of large number of $\beta$-D-glucose units joined by $\beta$-glycosidic linkages.
Starch is a mixture of amylose and amylopectin. It is a polymer of $\alpha$-D-glucose units.
IV. Amylose is a branched chain polysaccharide. Hence, the statement IV is incorrect.
V. Amylopectin is a branched polysaccharide. Thus, the statement V is incorrect.