Which vitamin contains a Cobalt atom in its corrin ring structure and its deficiency causes Pernicious Anemia?
Answer and explanation
Correct answer: D. Vitamin B12
- Step 1: Vitamin B12 is a cobalt-containing organometallic coordination complex synthesized exclusively by bacteria. Step 2. Lack of gastric intrinsic factor impairs B12 absorption in the ileum, causing megaloblastic macrocytic anemia and subacute combined cord degeneration (pernicious anemia). Answer: Vitamin B12 (Cobalamin). Why not the others: Folic acid causes megaloblastic anemia without neurological signs; Vitamin B6 is pyridoxine; Vitamin B2 is riboflavin.
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