Question

Select all that apply. Which of the following play a role in lining chromosomes up at the metaphase plate and/or then moving sister chromatids to opposite ends of the cell during mitosis?

		kinetochore microtubules
		centrosomes
		the spindle apparatus
		dynein and kinesin
		kinetochores

Answer 1

- Small disc shaped structure at the surface be of centromere is called kinetochore. These structures serve as the site for attachment of spindle fibres.

- centrosome contains two centriole , arranged perpendicular to each other. Here the spindle fibres formation occurs. There are two centrosome , one at opposite pole.

- The spindle apparatus includes spindle microtubules, associated proteins which includes dynein and kinesin molecular motor, and condensed chromosome.

- the microtubules which has been attached to the kinetochore is called the kinetochore microtubules.

- All the given option above play a role in lining chromosome up at the metaphase plate and then moving sister chromatid to opposite ends of the cell during mitosis.

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