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Both starch and cellulose are polysaccharides made of individual glucose molecules. Why then can humans digest starch but not cellulose

User Havij
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Answer:

Starch and cellulose are two very similar polymers. In fact, they are both made from the same monomer, glucose, and have the same glucose-based repeat units. ... Your body contains enzymes that break starch down into glucose to fuel your body. But we humans don't have enzymes that can break down cellulose

User Frederik Ziebell
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