Question:
Haemoglobin in RBCs is a:
Haemoglobin in RBCs is a:
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Remember: "Heme" contains Iron (Metal) and gives color (Chrome), so it is a Metalloprotein and a Chromoprotein.
Updated On: May 5, 2026
- Glycoprotein
- Metalloprotein (chromoprotein)
- Lipoprotein
- Simple protein
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The Correct Option is B
Solution and Explanation
Step 1: Concept
Haemoglobin is a complex protein found in red blood cells (RBCs) responsible for transporting oxygen throughout the body.
Step 2: Meaning
A metalloprotein is a protein that contains a metal ion cofactor. A chromoprotein is a conjugated protein that contains a pigmented prosthetic group.
Step 3: Analysis
Haemoglobin consists of globin proteins bound to heme groups. Each heme group contains an iron ion ($Fe^{2+}$), making it a metalloprotein. Because the heme group provides the red pigment to blood, it is also classified as a chromoprotein.
Step 4: Conclusion
Thus, haemoglobin is correctly identified as a metalloprotein (chromoprotein) due to its iron content and pigmented nature. Final Answer: (B)
Haemoglobin is a complex protein found in red blood cells (RBCs) responsible for transporting oxygen throughout the body.
Step 2: Meaning
A metalloprotein is a protein that contains a metal ion cofactor. A chromoprotein is a conjugated protein that contains a pigmented prosthetic group.
Step 3: Analysis
Haemoglobin consists of globin proteins bound to heme groups. Each heme group contains an iron ion ($Fe^{2+}$), making it a metalloprotein. Because the heme group provides the red pigment to blood, it is also classified as a chromoprotein.
Step 4: Conclusion
Thus, haemoglobin is correctly identified as a metalloprotein (chromoprotein) due to its iron content and pigmented nature. Final Answer: (B)
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