The chemical formula of oxyhaemoglobin is

Options

A. `Hb(O_(2))_(4)`
B. `Hb(O_(3))_(4)`
C. `Hb_(2)O_(2)`
D. `Hb(O_(2))_(6)`

Answer

To find the chemical formula of oxyhemoglobin, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Hemoglobin**: Hemoglobin is a protein found in red blood cells that is primarily responsible for transporting oxygen from the lungs to the tissues and carbon dioxide from the tissues back to the lungs.

2. **Structure of Hemoglobin**: Hemoglobin consists of four polypeptide chains, specifically two alpha chains and two beta chains. Each of these chains contains a heme group.

3. **Heme Group Composition**: Each heme group contains an iron (Fe²⁺) ion that can bind to one molecule of oxygen (O₂). Since there are four chains in hemoglobin, there are four heme groups, which means hemoglobin can bind to four molecules of oxygen.

4. **Combining Hemoglobin and Oxygen**: When hemoglobin binds with oxygen, it forms oxyhemoglobin. The binding of oxygen to hemoglobin can be represented as:
\[ \text{Hb} + 4 \text{O}_2 \rightarrow \text{HbO}_2 \]
However, since each heme group can bind to one O₂ molecule, the overall formula for oxyhemoglobin is:
\[ \text{Hb} + 4 \text{O} \rightarrow \text{HbO}_4 \]

5. **Final Chemical Formula**: The correct chemical formula for oxyhemoglobin is therefore represented as:
\[ \text{HbO}_2 \]
This indicates that one molecule of hemoglobin (Hb) combines with one molecule of oxygen (O₂) to form oxyhemoglobin.

### Conclusion:
The chemical formula of oxyhemoglobin is **HbO₂**.

---