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What is the basic structural difference ...

What is the basic structural difference between starch and cellulose?

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Starch is not a single compound . It consists of amylose and amylopectin. In contrast , cellulose is a single compound. Amylose is a linear condensation polymer of `alpha`-D-glucose while cellulose is a linear condensation polymer of `beta`-D-glucose. In amylose , C-1 of one glucose unit is connected to `C-4` of the other through `alpha`-glycosidic linkage as shown in Fig.14.8. However , in cellulose `C-1` of one glucose unit is connected to `C-4` of the other through `beta`-glycosidic linkage . Amylopectin , on the other hand , has highly branched structure.
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Knowledge Check

  • Starch and cellulose are

    A
    Branched polysaccharides
    B
    Storage products
    C
    Components of plant cell walls
    D
    Composed of glucose.

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