Question:
Which of the following ionic species is present in hemoglobin and responsible for transformation of oxygen ?
Which of the following ionic species is present in hemoglobin and responsible for transformation of oxygen ?
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Haemoglobin contains iron in the +2 state inside a heme group.
Updated On: Oct 1, 2026
- \(\text{Ca}^{+2}\)
- \(\text{Co}^{+3}\)
- \(\text{Fe}^{+2}\)
- \(\text{Mg}^{+2}\)
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The Correct Option is C
Solution and Explanation
Step 1: Understanding the Concept:
Haemoglobin is a protein that carries oxygen in blood. Each heme group holds one metal ion at the centre of a porphyrin ring.
Step 2: Detailed Explanation:
The metal ion is \(\text{Fe}^{2+}\). It binds oxygen reversibly and carries it from the lungs to the tissues.
\(\text{Mg}^{2+}\) is present in chlorophyll, \(\text{Co}^{3+}\) is in vitamin B\(_{12}\), and \(\text{Ca}^{2+}\) is found in bones and in blood clotting, but none is in haemoglobin.
Step 3: Final Answer:
\(\text{Fe}^{2+}\), option (C).
Final Answer:
Haemoglobin contains Fe2+. \[ \boxed{\text{(C) }\text{Fe}^{2+}} \]
Haemoglobin is a protein that carries oxygen in blood. Each heme group holds one metal ion at the centre of a porphyrin ring.
Step 2: Detailed Explanation:
The metal ion is \(\text{Fe}^{2+}\). It binds oxygen reversibly and carries it from the lungs to the tissues.
\(\text{Mg}^{2+}\) is present in chlorophyll, \(\text{Co}^{3+}\) is in vitamin B\(_{12}\), and \(\text{Ca}^{2+}\) is found in bones and in blood clotting, but none is in haemoglobin.
Step 3: Final Answer:
\(\text{Fe}^{2+}\), option (C).
Final Answer:
Haemoglobin contains Fe2+. \[ \boxed{\text{(C) }\text{Fe}^{2+}} \]
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