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Which of the following statements regarding polysaccharides is INCORRECT?

Options

  1. AAmylose is a water-soluble component of starch composed of -D-glucose units joined by C₁-C₄ glycosidic linkage
  2. BCellulose is a straight-chain polysaccharide composed of -D-glucose units joined by C₁-C₄ glycosidic linkages.
  3. CGlycogen is a structural polysaccharide found in plant cell walls with highly branched -C₁-C₆ linkages.
  4. DAmylopectin is a water-insoluble branched chain polymer of -D-glucose with C₁-C₄ chain linkages and C₁-C₆ bran

Correct answer

C. Glycogen is a structural polysaccharide found in plant cell walls with highly branched -C₁-C₆ linkages.

Step-by-step solution

Glycogen is an animal storage polysaccharide (often called animal starch), not a plant structural polysaccharide. Its structure is similar to amylopectin, consisting of -D-glucose units with -C₁-C₄ chains and -C₁-C₆ branching, but it is more highly branched. Cellulose is the primary structural polysaccharide in plants. Amylose is indeed a water-soluble component of starch and has -C₁-C₄ linkages. Cellulose is a straight chain of -D-glucose with C₁-C₄ linkages. Amylopectin is water-insoluble and has -C₁-C₄ and -C₁-C

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