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Glucose Polymerization Products: Amylose, Glycogen, Amylopectin

 Which of the following compounds is NOT a polymerization product of alpha-D-glucose, a) amylose b) cellulose c) glycogen d) amylopectin?

The correct answer is b) cellulose.

Amylose, glycogen, and amylopectin are all polymerization products of alpha-D-glucose.

Amylose is a linear polymer of alpha-D-glucose units connected by alpha-1,4-glycosidic bonds. It forms a helical structure and is a component of starch.

Glycogen is a highly branched polymer of alpha-D-glucose units connected by alpha-1,4-glycosidic bonds with alpha-1,6-glycosidic branch points. It serves as a storage form of glucose in animals and humans.

Amylopectin is also a branched polymer of alpha-D-glucose units connected by alpha-1,4-glycosidic bonds with alpha-1,6-glycosidic branch points. It is the major component of starch and has a more highly branched structure than glycogen.

Cellulose, on the other hand, is a polymer of beta-D-glucose units connected by beta-1,4-glycosidic bonds. It is not a product of the polymerization of alpha-D-glucose and has a different structure and properties compared to amylose, glycogen, and amylopectin. Cellulose is the main structural component of plant cell walls.

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