Question

Absorption of vitamin $B_{12}$ in human requires "P" glycoprotein secreted from "Q". The correct choice of P and Q are

• A. P=Extrinsic factor and Q=Stomach
• B. P=Intrinsic factor and Q=Stomach
• C. P=Intrinsic factor and Q=Small intestine
• D. P=Exopolysaccharide and Q=Small intestine

Answer 1

The correct option is B P=Intrinsic factor and Q=Stomach

There is a glycoprotein which is produced by the cells in the lining of the stomach. This glycoprotein is known as the intrinsic factor. This factor facilitates the absorption of vitamin B${}_{12}$. So, the label P refers to intrinsic factor and the label Q refers to stomach.

Thus, the correct answer is option B.