Structure absent from fresh frozen blood plasma is

Options

A. Immunoglobulin
B. Plasma
C. Albumin
D. Platelets

Answer

**Step-by-Step Solution:**

1. **Understanding Fresh Frozen Blood Plasma**: Fresh frozen blood plasma is a component of blood that is separated from the cells and frozen shortly after collection. It contains various proteins, hormones, and antibodies but lacks cellular components.

2. **Identifying Components of Blood Plasma**: Blood plasma is primarily composed of water, electrolytes, proteins (like albumin and immunoglobulins), nutrients, and waste products. The major proteins include immunoglobulins, albumin, and clotting factors.

3. **Analyzing the Given Options**: The question asks which structure is absent in fresh frozen blood plasma. The options include:
- Immunoglobulin
- Plasma
- Albumin
- Platelets

4. **Evaluating Each Option**:
- **Immunoglobulin**: These are present in blood plasma and are important for immune response.
- **Plasma**: This is the liquid component itself, so it cannot be absent.
- **Albumin**: This protein is also a significant part of plasma and is present.
- **Platelets**: These are cellular components involved in clotting and are not present in plasma since they are part of the cellular fraction of blood.

5. **Conclusion**: The structure that is absent from fresh frozen blood plasma is **platelets**. They play a crucial role in blood clotting, but since fresh frozen plasma is a liquid component, platelets are not included.

**Final Answer**: Platelets are absent from fresh frozen blood plasma.

---