Which cell organelle is surrounded by amorphous pericentriolar material?

Options

A. (a) centrosome
B. (b) RER
C. (c) SER
D. (d) centriole

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks which cell organelle is surrounded by amorphous pericentriolar material. The term "pericentriolar material" is key to identifying the organelle.

2. **Identifying the Organelle**: The organelle associated with pericentriolar material is the centriole. Centrioles are cylindrical structures that play a crucial role in cell division.

3. **Location of Centrioles**: Centrioles are typically located near the nuclear membrane within the cell. This positioning is important for their function during cell division.

4. **Function of Centrioles**: Centrioles are primarily active during cell division. Their main function is to organize microtubules, which are essential for the separation of chromosomes during mitosis.

5. **Distinguishing Between Options**:
- Option A (Centrosome): This is incorrect as a centrosome consists of a pair of centrioles, not just one.
- Option B (Rough Endoplasmic Reticulum): This is incorrect as rough ER is involved in protein synthesis and does not have pericentriolar material.
- Option C (Smooth Endoplasmic Reticulum): This is also incorrect as smooth ER is involved in lipid synthesis and detoxification.
- Option D (Centriole): This is the correct answer as it is the only option that matches the description of being surrounded by amorphous pericentriolar material.

6. **Conclusion**: Therefore, the cell organelle surrounded by amorphous pericentriolar material is the **centriole**.

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