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Which one of the following pairs of food components in humans reaches the stomach totally undigested?

  • Protein and starch

  • Starch and fat

  • Fat and cellulose

  • Starch and cellulose

Answer

C.

Fat and cellulose

In humans, starch is digested in the buccopharyngeal cavity. Cellulose is not digested in the humans because cellulose contains β -1, 4-linkages and vertebrates themselves do not possess any enzymes capable of hydrolyzing β-1, 4 - linkages. Protein is digested in stomach and fat in the small intestine.Thus in the given options, fat and cellulose reach totally undigested in the stomach of humans

In humans, starch is digested in the buccopharyngeal cavity. Cellulose is not digested in the humans because cellulose contains β -1, 4-linkages and vertebrates themselves do not possess any enzymes capable of hydrolyzing β-1, 4 - linkages. Protein is digested in stomach and fat in the small intestine.Thus in the given options, fat and cellulose reach totally undigested in the stomach of humans