Question

Metal ion present in Vitamin B₁₂ is
1. Fe²⁺
2. Cr²⁺
3. Co²⁺
4. Mg²⁺

Answer 1

Correct Answer - Option 3 : Co²⁺

The correct answer is Co2⁺

• The metal ion present in Vitamin B₁₂ is Co²⁺.

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• ​Vitamins:
  • It was first invented by FG Hopkins.
  • The term vitamin was coined by C Funk.
  • They provide no calories, they only regulate chemical reactions occurring in the metabolism of the body.
    • Vitamin is soluble in water: Vitamin-B and Vitamin-C.
    • Vitamin soluble in fat: Vitamin-A, Vitamin-D, Vitamin-E and Vitamin-K.
• Vitamin B₁₂: 
  • ​Cobalt is found in Vitamin-B₁₂.
  • Its chemical name is Cyanocobalamin.
  • Its deficiency causes Pernicious anaemia.
  • It can be found in meat, poultry, fish, eggs and milk.
• Synthesis of Vitamin-D and K takes place in our body.
• Synthesis of vitamins cannot be done by the cells and it is fulfilled by the vitamin foods.