Prokaryotic cells do not have

Options

A. Nucleolus
B. Centrioles
C. Membrane-bound organelles
D. All of these

Answer

### Step-by-Step Solution:

1. **Understanding Prokaryotic Cells**:
- Prokaryotic cells are primitive, simple organisms that lack a defined nucleus and other complex structures. They are characterized by their lack of membrane-bound organelles.

2. **Analyzing the Options**:
- **Nucleolus**: Prokaryotic cells do not have a nucleolus because they do not have a true nucleus. Instead, their genetic material is located in a region called the nucleoid, which is not membrane-bound.
- **Centrioles**: Centrioles are involved in cell division and are typically found in eukaryotic cells. Prokaryotic cells reproduce asexually, so they do not require centrioles for cell division.
- **Membrane-bound Organelles**: Prokaryotic cells lack membrane-bound organelles such as mitochondria, endoplasmic reticulum, and Golgi apparatus. They perform all cellular functions within the cytoplasm.

3. **Conclusion**:
- Since prokaryotic cells do not have nucleolus, centrioles, or membrane-bound organelles, the correct answer is "all of these."

### Final Answer:
Prokaryotic cells do not have nucleolus, centrioles, or membrane-bound organelles. Therefore, the answer is **all of these**.

---