Which one of the following is not an inclusion body found in prokaryotes ?

Options

A. Phosphate granule
B. Cyanophycean granule
C. Glycogen granule
D. Polysome

Answer

To determine which of the following is not an inclusion body found in prokaryotes, we need to analyze each option provided:

1. **Phosphate granule**:
- Phosphate granules, also known as volutin or metachromatic granules, are indeed found in prokaryotes. They serve as a storage form of phosphate.

2. **Cyanophysine granule**:
- Cyanophysine granules are also present in certain prokaryotes, particularly cyanobacteria. They serve as a nitrogen storage compound.

3. **Glycogen granule**:
- Glycogen granules are another form of storage found in prokaryotes. They store carbohydrates and can be utilized for energy.

4. **Polysome**:
- Polysomes, or polyribosomes, are complexes of multiple ribosomes translating a single mRNA strand. They are primarily found in eukaryotic cells and are not considered inclusion bodies in prokaryotes.

Based on this analysis, the answer to the question is that **polysome** is not an inclusion body found in prokaryotes.

### Step-by-Step Solution:
1. **Identify the options**: The options given are phosphate granule, cyanophysine granule, glycogen granule, and polysome.
2. **Analyze each option**:
- Phosphate granule: Found in prokaryotes.
- Cyanophysine granule: Found in prokaryotes.
- Glycogen granule: Found in prokaryotes.
- Polysome: Not found in prokaryotes; present in eukaryotes.
3. **Determine the correct answer**: Since polysome is not an inclusion body found in prokaryotes, it is the correct answer.

### Final Answer:
**Polysome** is not an inclusion body found in prokaryotes.