The point of attachment of microtubules on the chromosomes is called as

Options

A. Centromere
B. Kinetochore
C. Chromatid
D. Spindle

Answer

To answer the question "The point of attachment of microtubules on the chromosomes is called as," we will analyze the options provided and identify the correct one step by step.

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for the specific term that describes where microtubules attach to chromosomes during cell division.

2. **Reviewing the Options**: The options given are:
- a) Centromere
- b) Kinetochore
- c) Chromatid
- d) Pendant

3. **Analyzing Each Option**:
- **Option a: Centromere**: The centromere is a specialized DNA sequence on a chromosome that plays a crucial role in the pairing of sister chromatids. However, it is not the direct point of attachment for microtubules. Therefore, this option is incorrect.

- **Option b: Kinetochore**: The kinetochore is a protein complex that forms at the centromere during cell division. It is specifically the structure that serves as the attachment point for spindle fibers (microtubules). This makes this option correct.

- **Option c: Chromatid**: A chromatid refers to one half of a duplicated chromosome. It is not a point of attachment for microtubules, so this option is incorrect.

- **Option d: Pendant**: This term does not relate to cell division or the attachment of microtubules to chromosomes, making this option incorrect.

4. **Conclusion**: After analyzing all the options, the correct answer is **b) Kinetochore**. This is the point of attachment of microtubules on the chromosomes during cell division.

### Final Answer:
The point of attachment of microtubules on the chromosomes is called the **Kinetochore**.

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