Q. Which one of the following statements is true regarding digestion and absorption of food in humans?
A) Fructose and amino acids are absorbed through intestinal mucosa with the help of carrier ions like Na⁺.
B) Chylomicrons are small lipoprotein particles that are transported from intestine into blood capillaries.
C) About 60% of starch is hydrolysed by salivary amylase in our mouth.
D) Oxyntic cells in our stomach secrete the proenzyme pepsinogen.
Explanation
[Solution from source] Old NCERT states that fructose and some amino acids are absorbed with the help of carrier ions like Na⁺ (facilitated transport). Chylomicrons go into the lymph vessels (lacteals), not blood capillaries; salivary amylase hydrolyses about 30% of starch; and oxyntic cells secrete HCl, while chief cells secrete pepsinogen. Answer (1).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.