What structure pulls duplicated chromosomes to opposite ends of the cell during mitosis?

The structure that pulls duplicated chromosomes to opposite ends of the cell during mitosis is spindle fibers attached to the centromeres. During the process of mitosis, specifically during the anaphase stage, these spindle fibers, which are composed of microtubules, connect to the centromeres of each chromosome. By pulling on these centromeres, the spindle fibers effectively separate the sister chromatids and draw them toward opposite poles of the cell. This ensures that each daughter cell receives an identical set of chromosomes.

Other options might mention related structures or processes involved in mitosis, but they do not specifically address the direct role of spindle fibers in connection with centromeres during the critical moment of chromosome separation. Understanding this mechanism is vital for comprehending how cells divide accurately and maintain genetic stability.