Q. Which one of the following pairs of food components in humans reaches the stomach totally undigested?
A) Starch and fat
B) Fat and cellulose
C) Starch and cellulose
D) Protein and starch
Explanation
[Solution from source] Saliva contains salivary amylase that starts starch digestion in the mouth but has no fat-digesting enzyme in humans, and cellulose is never digested by human enzymes. So fat and cellulose reach the stomach unchanged, while starch is already partly digested. Answer (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.