All bacteria have the following organelle

Options

A. Mesosome
B. Golgi bodies
C. Mitochondria
D. Chloroplast.

Answer

**Step-by-Step Solution:**

1. **Identify the Question**: The question asks which organelle is present in all bacteria.

2. **Understand Bacterial Structure**: Bacteria are classified as prokaryotic cells. This means they lack membrane-bound organelles that are typically found in eukaryotic cells.

3. **Evaluate the Options**:
- **Mesosome**: This is an invagination of the plasma membrane in bacteria. It is not a membrane-bound organelle in the traditional sense but is present in all bacteria.
- **Golgi Bodies**: These are membrane-bound organelles found in eukaryotic cells, not in bacteria.
- **Mitochondria**: These are also membrane-bound organelles found in eukaryotic cells, not in bacteria.
- **Chloroplast**: This is another membrane-bound organelle found in plant cells and some protists, not in bacteria.

4. **Conclusion**: Since all bacteria have mesosomes, which are formed by the invagination of the plasma membrane, the correct answer is **Mesosome**.

5. **Final Answer**: The organelle that is present in all bacteria is **Mesosome**.

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