What is the fourth step in mitosis where non-kinetochore spindle fibers lengthen and elongate the cell?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. Anaphase.
The fourth step in mitosis, anaphase, involves the separation of sister chromatids as they are pulled toward opposite poles of the cell. During this stage, non-kinetochore spindle fibers, which do not attach to the chromosomes, lengthen and push against each other. This elongation of the cell helps in separating the chromatids more effectively. The action of these fibers, alongside the movement of kinetochore fibers, ensures that each daughter cell will receive an identical set of chromosomes, preparing the cell for the final stages of mitosis and eventual cell division.