The most abundant protein of the serum is

Options

A. gamma globulin
B. albumin
C. prothrombin
D. fibrinogen

Answer

To solve the question "The most abundant protein of the serum is," we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: We need to identify which protein is the most abundant in human serum. Serum is the liquid part of blood that remains after coagulation.

2. **Identify the Options**: The options provided in the question include:
- Gamma globulin
- Albumin
- Prothrombin
- Fibrinogen

3. **Evaluate Each Option**:
- **Gamma Globulin**: This protein is present in serum at approximately 1.1%. It plays a role in the immune system by containing antibodies, but it is not the most abundant protein.
- **Albumin**: This is the most abundant protein in human serum. It accounts for about 60% of the total serum protein and is essential for maintaining osmotic pressure and transporting various substances.
- **Prothrombin**: This is a coagulation factor that is important for blood clotting but is not the most abundant protein in serum.
- **Fibrinogen**: This is a glycoprotein that plays a key role in blood clotting but is also not the most abundant protein in serum.

4. **Conclusion**: Based on the evaluations, the most abundant protein in serum is **Albumin**.

### Final Answer:
The most abundant protein of the serum is **Albumin**.

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