In a chromosome, on the sides of centromere disc-shaped structure are present called

Options

A. Telomere
B. Centromere
C. Kinetochore
D. Chromocentre

Explanation

**Step-by-Step Solution:**

1. **Understanding Chromosome Structure**: A chromosome is made up of two arms, referred to as the short arm and the long arm. The point where the two arms meet is called the centromere.

2. **Identifying the Structures**: On either side of the centromere, there are disk-shaped structures. These structures are crucial for the movement of chromosomes during cell division.

3. **Naming the Disk-Shaped Structures**: The disk-shaped structures located on the sides of the centromere are known as kinetochore. The kinetochore is essential for the attachment of spindle fibers during cell division.

4. **Clarifying Other Terms**:
- **Telomere**: This is the end part of a chromosome, not located near the centromere.
- **Centromere**: This is the constricted region of the chromosome where the two sister chromatids are joined.
- **Sister Chromatids**: These are the two identical halves of a duplicated chromosome, which are connected at the centromere.
- **Chromocenter**: This refers to a structure in the nucleus where chromatin is organized, but it is not directly related to the disk-shaped structures next to the centromere.

5. **Final Answer**: Therefore, the disk-shaped structures on the sides of the centromere are called **kinetochore**.

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