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NEET2009ZoologyDigestion and AbsorptionActual

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

Options

  1. AProtein and starch
  2. BStarch and fat
  3. CFat and cellulose
  4. DStarch and cellulose

Correct answer

C. Fat and cellulose

Step-by-step solution

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

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