Q. The metal ion present in vitamin B12 is:
✅ Correct Answer: (B)
cobalt
Explanation:
Vitamin B12 (also known as Cobalamin) contains Cobalt (Co) as its central metal ion.
- The presence of cobalt gives vitamin B12 its characteristic red color.
- It is essential for red blood cell formation, DNA synthesis, and nervous system function.
Why are the other options incorrect?
- Nickel (A) → Found in some enzymes but not in Vitamin B12.
- Iron (C) → Essential for hemoglobin but not present in B12.
- Zinc (D) → Important for immunity and enzyme function, but not in B12.
Thus, the correct answer is (B) Cobalt.
Explanation by: Mr. Dubey
Vitamin B12 (also known as Cobalamin) contains Cobalt (Co) as its central metal ion.
- The presence of cobalt gives vitamin B12 its characteristic red color.
- It is essential for red blood cell formation, DNA synthesis, and nervous system function.
Why are the other options incorrect?
- Nickel (A) → Found in some enzymes but not in Vitamin B12.
- Iron (C) → Essential for hemoglobin but not present in B12.
- Zinc (D) → Important for immunity and enzyme function, but not in B12.
Thus, the correct answer is (B) Cobalt.