An elaborate network of filamentous proteinaceous structures present in the cytoplasm which helps in the maintenance of cell shape is called

Options

A. Thylakoid
B. Endoplasmic Reticulum
C. Plamalemma
D. Cytoskeleton

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for a network of filamentous proteinaceous structures in the cytoplasm that helps maintain cell shape.

2. **Identifying Key Terms**:
- "Elaborate network"
- "Filamentous"
- "Proteinaceous structures"
- "Cytoplasm"
- "Maintenance of cell shape"

3. **Exploring Cell Structures**:
- Begin by recalling the components of a cell, including the cell membrane, nucleus, and cytoplasm.
- Recognize that the cytoplasm contains various organelles and structures.

4. **Evaluating Options**:
- **Thylakoid**: Part of chloroplasts, not filamentous or proteinaceous, and not found in the cytoplasm.
- **Endoplasmic Reticulum (ER)**: While present in the cytoplasm, it is not filamentous; it is an organelle made of membranes.
- **Plasma Lemma**: Another name for the cell membrane, which is not part of the cytoplasm.
- **Cytoskeleton**: A network of proteinaceous filaments that maintains the shape of the cell and is indeed present in the cytoplasm.

5. **Conclusion**: After evaluating the options, the only structure that fits all the criteria (filamentous, proteinaceous, present in the cytoplasm, and helps maintain cell shape) is the **cytoskeleton**.

**Final Answer**: The elaborate network of filamentous proteinaceous structures present in the cytoplasm which helps in the maintenance of cell shape is called the **cytoskeleton**.

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