Digestion and Absorption Question 43
43. Which one of the following statements is true regarding digestion and absorption of food in humans?
[2009]
(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.
Show Answer
Answer : a
Hints & Solution
(a) Fructose and amino acids are absorbed through intestinal mucosa with the help of carrier ions like $Na^{+}$. Carbohydrates are absorbed as monosaccharides (simple sugars such as glucose, fructose, and galactose that cannot be further broken down by hydrolysis) or as disaccharides (such as sucrose, lactose, maltose, and dextrin that can be hydrolyzed to two monosaccharides). These simpler molecules, however, must be obtained by the breaking down of polysaccharides, complex carbohydrates that contain many monosaccharides. Chief among these is amylase, a starch that accounts for 20 percent of dietary carbohydrate.
