Starch Cellulose, dextran and glycogen are…

Starch Cellulose, dextran and glycogen are…

Starch Cellulose, dextran and glycogen are polysaccharides. How are they similar? To what are their different properties due? Why can't an enzyme that hydrolyzes starch degrade cellulose? 
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Min Pages: 1 
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Other Requirements: only needs to be at least 150 words.