Metals required in synthesis of haemoglobin are

Options

A. iron
B. copper
C. cobalt
D. all of these

Answer

To answer the question regarding the metals required in the synthesis of hemoglobin, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Hemoglobin Structure**:
- Hemoglobin is a quaternary protein composed of four polypeptide chains: two alpha chains and two beta chains.

2. **Identifying Key Components**:
- Each of these polypeptide chains is associated with a heme group, which contains an iron atom (Fe).

3. **Role of Iron in Hemoglobin**:
- The iron in the heme group is crucial because it is the site where oxygen binds. Each hemoglobin molecule can carry four oxygen molecules due to the four iron atoms present.

4. **Considering Other Metals**:
- While iron is essential, other metals such as copper (Cu) and cobalt (Co) also play roles in the synthesis and function of hemoglobin. Copper is involved in various enzymatic reactions that may affect iron metabolism, and cobalt is a component of vitamin B12, which is important for red blood cell production.

5. **Conclusion**:
- Therefore, the metals required for the synthesis of hemoglobin include iron, copper, and cobalt. Thus, the correct answer is that all of these metals are required.

### Final Answer:
The metals required in the synthesis of hemoglobin are **iron, copper, and cobalt**.

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