Which of the following organelles does not have a double layer ?

Options

A. nuclei
B. lysosomes
C. Chloroplasts
D. mitochondria

Answer

To answer the question "Which of the following organelles does not have a double layer?" we need to analyze each of the given organelles: nucleus, lysosomes, chloroplasts, and mitochondria.

### Step-by-Step Solution:

1. **Identify the Organelles**: The organelles we need to evaluate are:
- Nucleus
- Lysosomes
- Chloroplasts
- Mitochondria

2. **Examine the Nucleus**:
- The nucleus is surrounded by a double membrane known as the nuclear envelope. This structure consists of an inner and outer membrane, making it a double-layered organelle.

3. **Examine Mitochondria**:
- Mitochondria also have a double membrane. The inner membrane is highly folded to form structures called cristae, which are involved in energy production.

4. **Examine Chloroplasts**:
- Chloroplasts are similarly double membrane-bound organelles. They have an inner and outer membrane, with the inner membrane surrounding the stroma and thylakoids.

5. **Examine Lysosomes**:
- Lysosomes, on the other hand, are bound by a single membrane. They contain enzymes for digestion and are not surrounded by a double membrane.

6. **Conclusion**:
- Based on the analysis, the organelle that does not have a double layer is **lysosomes**.

### Final Answer:
The organelle that does not have a double layer is **lysosomes**.

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