Which one is present on chromosome ?

Options

A. Centromere
B. Centrosome
C. Nucleus
D. Golgi body

Answer

To answer the question "Which one is present on chromosome?" we will analyze the options provided and identify the correct answer step by step.

### Step-by-Step Solution:

1. **Understanding Chromosomes**:
- Chromosomes are structures within cells that contain DNA. They play a crucial role in cell division and genetic inheritance.

2. **Analyzing the Options**:
- The options provided are:
- A) Centromere
- B) Centrosome
- C) Nucleus
- D) Golgi body

3. **Identifying Each Option**:
- **Centromere**: This is a specific region on a chromosome where the two sister chromatids are joined together. It plays a key role during cell division, particularly in the separation of chromatids.
- **Centrosome**: This is an organelle that serves as the main microtubule organizing center of the cell and is involved in cell division. It is not found on chromosomes.
- **Nucleus**: This is a membrane-bound organelle that houses the cell's genetic material (DNA). While chromosomes are found inside the nucleus, the nucleus itself is not present on chromosomes.
- **Golgi body**: This is an organelle involved in modifying, sorting, and packaging proteins and lipids. It is not found on chromosomes.

4. **Conclusion**:
- Among the options, the centromere is the only structure that is present on chromosomes. It is essential for the proper segregation of chromosomes during cell division.

### Final Answer:
The correct answer is **A) Centromere**.

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