What glucose residues are the various polysaccharides made of? Compare their structure and indicate similarities and differences.

The composition of starch and glycogen includes a-glucose, the composition of cellulose – (3-glucose. The difference in their structure leads to the formation of a different type of bonds in polymer molecules, which determines different properties and biological functions.
Starch has two structures; amylose – long unbranched chains and amylopectin – branched chains. Cellulose forms only unbranched long chains, and the number of glucose units in such a chain is much greater than in starch.
Starch is a white powdery substance, poorly soluble in cold water, and in hot swells and forms a gel.
Cellulose is a strong fibrous substance, practically insoluble in water.

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