The number of `alpha` polypeptides present in the haemoglobin

Options

A. 4
B. 1
C. 2
D. 3

Answer

To determine the number of alpha polypeptides present in hemoglobin, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Hemoglobin Structure**:
- Hemoglobin is a protein found in red blood cells that is responsible for transporting oxygen throughout the body.

2. **Composition of Hemoglobin**:
- Hemoglobin is composed of four polypeptide chains. Specifically, it consists of two types of chains: alpha (α) and beta (β) chains.

3. **Counting the Polypeptide Chains**:
- In hemoglobin, there are 2 alpha (α) polypeptide chains and 2 beta (β) polypeptide chains.

4. **Conclusion**:
- Therefore, the number of alpha polypeptides present in hemoglobin is **2**.

### Final Answer:
The number of alpha polypeptides present in hemoglobin is **2**.

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