Single membrane bound organelles are
1. Lysosomes
2. Peroxisomes
3. Ribosomes
4. Glyoxysomes

Options

A. I and II
B. I, II and III
C. I , II and IV
D. I,II , III and IV

Answer

To determine which of the given options are single membrane-bound organelles, we will analyze each option one by one.

### Step-by-Step Solution:

1. **Identify the Organelles**: The question provides four options: Lysosomes, Peroxisomes, Ribosomes, and Glyoxysomes.

2. **Analyze Lysosomes**:
- Lysosomes are membrane-bound organelles that contain digestive enzymes.
- They are involved in breaking down excess or worn-out cell parts.
- **Conclusion**: Lysosomes are single membrane-bound organelles.

3. **Analyze Peroxisomes**:
- Peroxisomes are also membrane-bound organelles.
- They play a role in the conversion of stored fatty acids into carbohydrates, which provide energy.
- **Conclusion**: Peroxisomes are single membrane-bound organelles.

4. **Analyze Ribosomes**:
- Ribosomes are not membrane-bound; they are made up of ribosomal RNA and proteins.
- They are the sites of protein synthesis in the cell.
- **Conclusion**: Ribosomes are NOT single membrane-bound organelles.

5. **Analyze Glyoxysomes**:
- Glyoxysomes are similar to peroxisomes and are also membrane-bound.
- Their primary function is to oxidize fatty acids, converting them into acetyl-CoA.
- **Conclusion**: Glyoxysomes are single membrane-bound organelles.

6. **Final Evaluation**:
- From the analysis, we conclude that Lysosomes, Peroxisomes, and Glyoxysomes are all single membrane-bound organelles.
- Ribosomes do not fit this category.

### Final Answer:
The single membrane-bound organelles among the options are:
- 1. Lysosomes
- 2. Peroxisomes
- 4. Glyoxysomes