Which one of the organelles is responsible for the formation of aster in cell division ?

Options

A. Ribosome
B. Centrosome
C. Lysosome
D. Chromosome

Answer

**Step-by-Step Solution:**

1. **Understand the Question**: The question asks which organelle is responsible for the formation of aster during cell division.

2. **Define Aster**: Aster is a star-shaped structure that forms during cell division. It consists of microtubules that radiate from the centrosome.

3. **Identify the Role of Microtubules**: Microtubules are part of the cytoskeleton and play a crucial role in maintaining the cell's shape and facilitating cell division.

4. **Locate the Organelle Responsible for Microtubule Formation**: The centrosome is the organelle that organizes microtubules and is essential for the formation of the aster.

5. **Evaluate the Options**:
- **Ribosome**: Involved in protein synthesis, not aster formation.
- **Centrosome**: Correct answer, as it is responsible for microtubule organization and aster formation.
- **Lysosome**: Involved in digestion and waste removal, not related to aster formation.
- **Chromosome**: Contains genetic material, not involved in aster formation.

6. **Conclusion**: The correct answer is the centrosome, as it is responsible for the formation of aster during cell division.

**Final Answer**: The organelle responsible for the formation of aster in cell division is the **centrosome**.

---