Question

Which one of the following food components in humans reaches the stomach totally undigested?
(i) Protein
(ii) Starch
(iii) Cellulose
(iv) Fat

• A. i, ii, and iii
• B. ii, iii, and iv
• C. i, iii, and iv
• D. i, ii, iii, and iv

Answer 1

The correct option is C i, iii, and iv

In humans, starch is digested in the oral cavity with the help of the enzyme salivary amylase.
Cellulose is not digested in humans because vertebrates do not possess any enzyme capable of digesting it. Protein is digested in the stomach and the small intestine, and fat is digested a little in the stomach and mostly in the small intestine.