Amembranous cell organelle .centriole. is present in

Options

A. All plant cells
B. All animal cells
C. All prokaryotic cells
D. All cyanobacteria

Answer

To answer the question about the presence of the membranous cell organelle, centriole, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Centrioles**: Centrioles are barrel-shaped structures that play a crucial role in cell division and the formation of microtubules, which are essential for maintaining the cell's shape and structure.

2. **Location of Centrioles**: Centrioles are typically found in the centrosome of eukaryotic cells. The centrosome is the microtubule-organizing center of the cell.

3. **Presence in Different Cell Types**:
- Centrioles are present in animal cells and other eukaryotic cells.
- They are **absent** in plant cells and prokaryotic cells (like bacteria).

4. **Conclusion**: Based on the information about where centrioles are found, we can conclude that centrioles are present in all animal cells but not in plant cells or prokaryotes.

5. **Final Answer**: Therefore, the correct answer to the question is that centrioles are present in **all animal cells**.