They can be surrounded by single layer membrane

Options

A. Sulphur granules
B. Glycogen granules
C. Phosphate granules
D. Cyanophycean granules.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks which type of granule can be surrounded by a single layer membrane. We need to analyze the options provided: sulfur granules, glycogen granules, phosphate granules, and cyanophagein granules.

2. **Analyzing the Options**:
- **Sulfur Granules**: These are known to be surrounded by a single layer membrane. They are often found in certain bacteria and serve as energy storage.
- **Glycogen Granules**: These are storage forms of glucose and are typically not surrounded by a single layer membrane.
- **Phosphate Granules**: Similar to glycogen, these are also not surrounded by a single layer membrane.
- **Cyanophagein Granules**: These granules are associated with cyanobacteria and are not surrounded by a single layer membrane.

3. **Conclusion**: Based on the analysis, the only granule that can be surrounded by a single layer membrane is **sulfur granules**. Therefore, the correct answer is option number 1: sulfur granules.

4. **Final Answer**: Sulfur granules can be surrounded by a single layer membrane.

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