What Is The Basic Difference Between Starch And Cellulose?
Starch and cellulose are similar polymers. Both are made from the same monomer, namely glucose, and both have the same repeat units having a glucose base. But the main difference is that while all the repeat units of glucose present in starch are unidirectional (that is, they are all orientated towards one direction), each successive repeat unit of glucose present in cellulose, on the other hand, rotates at an angle of 180 degrees around the axis of a backbone made of chains of polymers, relative to the last repeat unit of cellulose. The units of glucose in starch are connected by alpha linkages, while the units of glucose in cellulose are connected by beta linkages. Starch can be eaten, but cellulose is not digestible by the human body. Starch is broken down into glucose to sustain the body, but the body is not equipped with the enzymes that can break down cellulose into glucose. The enzymes which convert cellulose into glucose are found in the bodies of termites, which feed on wood,
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