The three dimensional network of protein filaments with in the cytoplasm of eukaryotic cell is called the :-

Options

A. Endoplasmic Reticulum
B. Golgi apparatus
C. Cytoskeleton
D. Peroxisome

Answer

To solve the question, "The three-dimensional network of protein filaments within the cytoplasm of a eukaryotic cell is called the:", we will analyze the options provided and identify the correct answer step by step.

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for the name of the structure that forms a three-dimensional network of protein filaments within the cytoplasm of eukaryotic cells.

2. **Analyze the Options**:
- **Endoplasmic Reticulum (ER)**: This is a transport system within the cell, consisting of rough (RER) and smooth (SER) types. RER is involved in protein synthesis, while SER is involved in detoxification and lipid synthesis.
- **Golgi Apparatus**: This structure is primarily involved in packaging and modifying proteins and lipids for secretion or delivery to other organelles.
- **Cytoskeleton**: This is a network of protein filaments that provides structural support and shape to the cell. It is indeed a three-dimensional network.
- **Peroxisomes**: These are organelles involved in oxidation reactions, not a network of filaments.

3. **Identify the Correct Answer**: The only option that describes a three-dimensional network of protein filaments in the cytoplasm is the **Cytoskeleton**.

4. **Conclusion**: Therefore, the correct answer to the question is **Cytoskeleton**.

### Final Answer:
The three-dimensional network of protein filaments within the cytoplasm of a eukaryotic cell is called the **Cytoskeleton**.

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