Cell organelle covered by a single unit membrane is

Options

A. Glyoxysome
B. Lysosome
C. Peroxisome
D. All the above

Answer

To determine which cell organelle is covered by a single unit membrane, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Understanding Unit Membrane**:
- A unit membrane refers to a single lipid bilayer that surrounds a cell organelle. This membrane is crucial for maintaining the integrity and functionality of the organelle.

2. **Analyzing Glyoxysomes**:
- Glyoxysomes are specialized peroxisomes found in plants, particularly in germinating seeds. They are involved in the conversion of stored fats into carbohydrates.
- Glyoxysomes are surrounded by a single unit membrane.

3. **Analyzing Lysosomes**:
- Lysosomes are membrane-bound organelles known as "suicidal bags" due to their role in breaking down waste materials and cellular debris through hydrolytic enzymes.
- Lysosomes are also covered by a single unit membrane.

4. **Analyzing Peroxisomes**:
- Peroxisomes are found in both plant and animal cells and are involved in various oxidative reactions, including the breakdown of fatty acids and detoxification processes.
- Peroxisomes are similarly surrounded by a single unit membrane.

5. **Conclusion**:
- Since all three organelles (glyoxysomes, lysosomes, and peroxisomes) are covered by a single unit membrane, the correct answer to the question is **"all of the above."**

### Final Answer:
The cell organelle covered by a single unit membrane is **all of the above** (glyoxysome, lysosome, peroxisome).

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