Which form cell wall and spindle ?

Options

A. Golgi
B. ER
C. Microfilaments
D. Microtubules

Answer

To answer the question "Which form cell wall and spindle?", we will analyze the options provided and determine which one is responsible for the formation of the cell wall and spindle fibers.

### Step-by-Step Solution:

1. **Identify the Options**: The options given are:
- Golgi
- Endoplasmic Reticulum (ER)
- Microfilaments
- Microtubules

2. **Analyze Each Option**:
- **Golgi**: The Golgi apparatus is primarily involved in packaging and modifying proteins and lipids. It does not directly form the cell wall or spindle fibers.
- **Endoplasmic Reticulum (ER)**: The ER has two types:
- Rough Endoplasmic Reticulum (RER): Involved in protein synthesis.
- Smooth Endoplasmic Reticulum (SER): Involved in lipid synthesis.
Neither type of ER is responsible for forming the cell wall or spindle fibers.
- **Microfilaments**: These are part of the cytoskeleton and are involved in cell movement and maintaining the cell's shape. They do not form the cell wall or spindle fibers.
- **Microtubules**: These are also part of the cytoskeleton and play a crucial role in cell division by forming spindle fibers. They are also involved in the formation of the cell wall in plant cells.

3. **Conclusion**: The correct answer is **Microtubules**, as they are responsible for both cell wall formation (in plant cells) and the formation of spindle fibers during cell division.

### Final Answer:
**Microtubules** (Option 4) form the cell wall and spindle fibers.

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