A network of filamentous proteinaceous structures present in
the cytoplasm is

Options

A. Endoplasmic reticulum
B. Polysome
C. Cytoskeleton
D. None

Answer

To solve the question regarding the network of filamentous proteinaceous structures present in the cytoplasm, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Key Terms**: The question mentions "a network of filamentous proteinaceous structures" in the cytoplasm. We need to focus on what this description refers to.

2. **Understand the Options**: The options provided are:
- Endoplasmic reticulum
- Polyzome
- Cytoskeleton
- None

3. **Analyze Each Option**:
- **Endoplasmic Reticulum**: This is a network of membranes involved in protein and lipid synthesis but is not primarily filamentous or proteinaceous in the way described.
- **Polyzome**: This refers to a cluster of ribosomes translating the same mRNA, not a filamentous structure.
- **Cytoskeleton**: This is a network of protein filaments (microtubules, intermediate filaments, and microfilaments) that provides structural support and shape to the cell.
- **None**: This option suggests that none of the provided answers are correct.

4. **Select the Correct Answer**: Based on the analysis, the cytoskeleton is the only option that fits the description of a filamentous proteinaceous structure present in the cytoplasm. It plays a crucial role in maintaining the shape, size, and structure of the cell.

5. **Conclusion**: Therefore, the correct answer is **Cytoskeleton**.

### Final Answer:
The correct answer is **Cytoskeleton**.

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