Which of the following cell does not have a nucleus ?

Options

A. white blood cell
B. red blood cell
C. nerve cell
D. muscle cell

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks which type of cell does not have a nucleus. To answer this, we need to identify the cells listed and determine if they contain a nucleus.

2. **Identifying the Cells**:
- **White Blood Cell**: These cells are part of the immune system and do contain a nucleus.
- **Red Blood Cell**: These cells are responsible for transporting oxygen in the body. Importantly, mature red blood cells do not have a nucleus.
- **Nerve Cell**: These cells, which are involved in transmitting signals throughout the body, do contain a nucleus.
- **Muscle Cell**: Muscle cells, also known as myocytes, contain a nucleus.

3. **Analyzing the Red Blood Cell**:
- Red blood cells are unique because they lose their nucleus as they mature. This adaptation allows them to carry more hemoglobin, which is essential for oxygen transport.

4. **Conclusion**: Based on the analysis, the cell that does not have a nucleus is the **mature red blood cell**.

**Final Answer**: The mature red blood cell does not have a nucleus.

---