Vitamin B₁₂ deficiency causes pernicious anemia. Animals cannot synthe

Vitamin B₁₂ deficiency causes pernicious anemia. Animals cannot synthesize vitamin B₁₂. Humans must obtain all their vitamin B₁₂ from their diet. The complexing metal ion in vitamin B₁₂ is :

[amp_mcq option1=”Mg²⁺ (Magnesium ion)” option2=”Fe²⁺ (Iron ion)” option3=”Co³⁺ (Cobalt ion)” option4=”Zn²⁺ (Zinc ion)” correct=”option3″]

This question was previously asked in

UPSC CDS-1 – 2016

Download PDF Attempt Online

Vitamin B₁₂ is also known as cobalamin. Its name is derived from the fact that its structure contains a central cobalt atom coordinated within a corrin ring system. The complexing metal ion in vitamin B₁₂ is Cobalt, typically in the Co³⁺ oxidation state.

Vitamin B₁₂ is named cobalamin because it contains a cobalt ion.

Magnesium (Mg²⁺) is found in chlorophyll. Iron (Fe²⁺/Fe³⁺) is found in hemoglobin and myoglobin. Zinc (Zn²⁺) is a cofactor in many enzymes.

More similar MCQ questions for Exam preparation:-