An elaborate network of filamentous proteinaceous structures present in the cytoplasm of an eukaryotic cell is called

Options

A. Cytoskeleton
B. Spindle fibres
C. Filaments
D. Contractile filaments

Answer

To solve the question, "An elaborate network of filamentous proteinaceous structures present in the cytoplasm of an eukaryotic cell is called," we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question is asking for the name of a specific structure found in the cytoplasm of eukaryotic cells. This structure is described as an "elaborate network of filamentous proteinaceous structures."

2. **Identify Key Terms**:
- "Elaborate network" suggests a complex arrangement.
- "Filamentous" indicates that the structures are thread-like.
- "Proteinaceous" means that these structures are made of proteins.
- "Cytoplasm" refers to the gel-like substance within the cell membrane.
- "Eukaryotic cell" indicates that we are dealing with cells that have a defined nucleus and organelles.

3. **Consider the Options**:
- The first option is **Cytoskeleton**. This is known to be a network of protein filaments and tubules that provides structural support and shape to the cell.
- Other options such as **spindle fibers**, **filament**, and **contractile filament** are more specific and do not encompass the entire network described.

4. **Evaluate the Correct Answer**:
- The cytoskeleton fits the description perfectly as it is indeed an elaborate network of filamentous protein structures present in the cytoplasm of eukaryotic cells. It plays a crucial role in maintaining the cell's shape, enabling movement, and facilitating intracellular transport.

5. **Conclusion**: Based on the analysis, the correct answer to the question is **Cytoskeleton**.

### Final Answer:
**Cytoskeleton**

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