Centriole occur in

Options

A. Centrosomes
B. Centromeres
C. Chromosomes
D. Spindle fibres

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks where centrioles occur. To answer this, we need to identify the structures or organelles that contain centrioles.

2. **Identifying the Options**: The options given are:
- A) Centrosome
- B) Centromere
- C) Chromosomes
- D) Spindle fibers

3. **Analyzing Each Option**:
- **A) Centrosome**: The centrosome is a microtubule organizing center found in animal cells. It is located near the nucleus and is composed of two centrioles.
- **B) Centromere**: The centromere is a region of a chromosome where the two sister chromatids are joined. It does not contain centrioles.
- **C) Chromosomes**: Chromosomes are structures that carry genetic information. They do not contain centrioles.
- **D) Spindle fibers**: Spindle fibers are structures that help separate chromosomes during cell division, but they are not where centrioles are found.

4. **Conclusion**: Since centrioles are found within the centrosome, the correct answer is option A) Centrosome.

5. **Final Answer**: Centrioles occur in the centrosome.

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