Which of the following granules functions as storage reservoir for phosphate in bacteria ?

Options

A. Sulphur granules
B. Cyanophycean granules
C. Volutin granules
D. PHB granules

Answer

To solve the question regarding which granules function as a storage reservoir for phosphate in bacteria, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Options**: The options provided are:
- Sulphur granules
- Cyanophycine granules
- Volatile granules
- PHB granules

2. **Analyze Each Option**:
- **Sulphur Granules**: These are aggregates of sulfur found in certain bacteria, primarily involved in sulfur metabolism, not phosphate storage.
- **Cyanophycine Granules**: These granules serve as a storage form for nitrogen and carbon, not specifically for phosphate.
- **Volatile Granules**: These granules are known to function as a storage reservoir for phosphate in bacteria.
- **PHB Granules**: These are polyhydroxybutyrate granules that serve as a storage form of carbon, not phosphate.

3. **Conclusion**: Based on the analysis, the granules that function as a storage reservoir for phosphate in bacteria are the **volatile granules**.

### Final Answer:
The correct answer is **volatile granules**.

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