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4 - What is the difference in the chemical structure of starch and cellulose? What is...

4 - What is the difference in the chemical structure of starch and cellulose? What is the structural effect of this difference, and its biological role?

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Cellulose is beta 1,4-linkage .

It's OH group of carbon one and four are placed differently hence it can only form straight chains. They occur in fiber form. Where as starch in alpha1,4-linkage the carbon 1 and carbon 4 face same way so starch can either branch or occur in straight chain. Due to this structure starch can roll up itself forming helical structure . Starch appear in grainform.

Starch is potent energy source of animals. Plants synthesis starch as product of photosynthesis and are widely used by humans and other animals in their diet. Cellulose is the structural polysaccharide of plants helps in cell rigidity , structure etc. They are principle energy source of ruminant animals including coe, deer cattles etc. They are used in cotton industries, paper industries etc.

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