Kinetochores are disc shaped structures associated with

Options

A. Telomeres
B. Centromeres
C. Chromomeres
D. Secondary constriction

Answer

**Step-by-Step Solution:**

1. **Understanding Kinetochores**: Kinetochores are specialized protein complexes that play a crucial role during cell division. They are disc-shaped structures that are essential for the proper segregation of chromosomes.

2. **Identifying the Location of Kinetochores**: Kinetochores are located at the centromere of chromosomes. The centromere is the region where sister chromatids are joined together and is critical for the movement of chromosomes during cell division.

3. **Examining the Options**: The question provides four options:
- Telomeres
- Centromeres
- Chromomeres
- Secondary constrictions

4. **Analyzing Each Option**:
- **Telomeres**: These are the protective caps at the ends of chromosomes and are not associated with kinetochores.
- **Centromeres**: This is the correct answer, as kinetochores are located at the centromeres of chromosomes.
- **Chromomeres**: These are bead-like structures on chromosomes and are not related to kinetochores.
- **Secondary constrictions**: These are regions on some chromosomes that do not relate to kinetochores.

5. **Conclusion**: Based on the analysis, the correct answer is **centromeres**. Kinetochores are disc-shaped structures associated with centromeres.

---