Which metal is present in Haemoglobin ?

Options

A. Fe
B. Mg
C. Ca
D. Al

Answer

**Step-by-Step Solution:**

1. **Understanding Hemoglobin**: Hemoglobin is a protein found in red blood cells (RBCs) that plays a crucial role in transporting oxygen from the lungs to the body's tissues and returning carbon dioxide from the tissues back to the lungs.

2. **Structure of Hemoglobin**: Hemoglobin is a chromo protein composed of four protein molecules. It consists of two alpha-globin chains and two beta-globin chains, forming a globular structure.

3. **Role of Hemigroup**: Within the hemoglobin molecule, there are four units of a component called the Hemigroup. Each Hemigroup contains a metal atom that is essential for its function.

4. **Identifying the Metal**: The metal present in the Hemigroup is iron (Fe). This iron atom is crucial for the binding of oxygen, allowing hemoglobin to carry oxygen throughout the body.

5. **Iron's Oxidation State**: In hemoglobin, the iron is typically found in the +2 oxidation state (Fe²⁺), which is important for its ability to bind to oxygen.

6. **Conclusion**: Therefore, the metal present in hemoglobin is iron.

**Final Answer**: The metal present in hemoglobin is iron (Fe).

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