Question

Absorption of $B_{12}$ requires glycoprotein P secreted by Q. P and Q are

• A. P extrinsic factor, Q Stomach
• B. P intrinsic factor, Q - Stomach
• C. P intrinsic factor, Q small intestine
• D. P exopolysaccharide, Q small intestine

Answer 1

The correct option is B P intrinsic factor, Q - Stomach

A glycoprotein 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 B12​. So, the label P refers to intrinsic factor and the label Q refers to stomach.

Hence, the correct answer is option (B).