Solved UPSC CDS/OTA Question
A solved UPSC CDS/OTA PYQ - decoded step-by-step.
Solve it the standard way once - then learn the shortcut.
Q · Digestive Systemmedium · 45s
Where is intrinsic factor produced and what is its function?
TopicDigestive System
Question Typemultiple choice
Difficultymedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
The complete worked solution.
Every step explained - no skipped algebra.
Intrinsic factor, a glycoprotein secreted by gastric parietal cells along with HCl, binds dietary vitamin B₁₂ in the small intestine, enabling its absorption in the ileum. Without intrinsic factor, pernicious anemia develops due to impaired B₁₂ uptake.
Final Answer: Option B - Stomach parietal cells, vitamin B₁₂ absorption