Questions: Q3.23. To which of the following can a microtubule attach? Check all that apply: Centrosome Centromere Kinetochore Cohesin

The microtubule can attach to the following:

1. Centrosome: Microtubules originate from the centrosome, which is the main microtubule-organizing center in animal cells. However, they do not attach to the centrosome in the same way they attach to other structures during cell division.

2. Centromere: Microtubules do not directly attach to the centromere. The centromere is the region of the chromosome where the kinetochore forms.

3. Kinetochore: The answer is this one. Microtubules attach to the kinetochore, which is a protein complex assembled on the centromere of each chromatid. This attachment is crucial for chromosome movement during mitosis and meiosis.

4. Cohesin: Microtubules do not attach to cohesin. Cohesin is a protein complex that holds sister chromatids together until they are separated during cell division.

In summary, the correct option is "Kinetochore," as microtubules attach to the kinetochore during cell division.