Question

Cellulose, the most important constituent of the plant cell wall is made up of:

• A. Unbranched chain of glucose molecules linked by an alpha 1,4-glycosidic bond
• B. Branched chains of glucose molecules linked by a beta 1,4-glycosidic bond in the linear chains and alpha 1,6- glycosidic bond at the sites of branching
• C. Unbranched chain of glucose molecules linked by beta 1,4-glycosidic bond
• D. Branched chains of glucose molecules linked by alpha 1,6- glycosidic bond at the site of branching

Answer 1

The correct option is C Unbranched chain of glucose molecules linked by beta 1,4-glycosidic bond

Cellulose is an unbranched homopolymer made of repeating units of glucose linked together by beta 1,4-glycosidic linkage.

Amylose is an unbranched chain of glucose molecules linked by an alpha 1,4-glycosidic bond.

Amylopectin is composed of branched chains of glucose molecules linked by an alpha 1,4-glycosidic bond in the linear chains and alpha 1,6-glycosidic bond at the sites of branching.