Question

Select the correct match of the digested products in humans given in column I with their absorption site and mechanism in column II

	Column I	Column II
(1)	Glycine, glucose	Small intestine, active absorption
(2)	Fructose, Na+	Small intestine passive absorption
(3)	Glycerol, fatty acids	Duodenum, move as chilomicrons
(4)	Cholesterol, maltose	Large intestine, active absorption

• A. (1)
• B. (2)
• C. (3)
• D. (4)

Answer 1

The Correct Option is A

The question asks us to match the digested products in humans listed in Column I with their corresponding absorption site and mechanism in Column II. We need to identify the correct pair.

1. **Glycine, glucose:**
   • Glycine and glucose are absorbed in the small intestine. The absorption mechanism for both these substances is active absorption.
   • Active absorption refers to the movement of molecules across a cell membrane against their concentration gradient, which requires energy in the form of ATP.
   This matches the description provided in Column II: Small intestine, active absorption.
2. **Fructose, Na⁺:**
   • Fructose absorption occurs in the small intestine mainly through a process known as facilitated diffusion, which is a type of passive absorption.
   • Sodium ions (Na⁺), however, are absorbed through active transport, not passive absorption.
   This does not correctly describe the absorption mechanism for both components in Column II: Small intestine passive absorption.
3. **Glycerol, fatty acids:**
   • Glycerol and fatty acids are first emulsified in the small intestine and absorbed in the form of micelles. They do not move as chylomicrons in the duodenum.
   • Chylomicrons are actually lipoprotein particles that transport dietary lipids from the intestines to other locations in the body.
   This does not correctly correspond with Column II: Duodenum, move as chylomicrons.
4. **Cholesterol, maltose:**
   • Cholesterol is absorbed in the small intestine and not the large intestine. It is absorbed through the formation of micelles, not through active absorption.
   • Maltose is a disaccharide that is broken down into glucose before absorption in the small intestine.
   This does not match Column II: Large intestine, active absorption.

Therefore, the correct match that aligns with the absorption site and mechanism described is Option (1): Glycine, glucose; Small intestine, active absorption.