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Multiple Choice
During which phase of mitosis are sister chromatids pulled by motor proteins to the cell's equator?
A
Telophase
B
Anaphase
C
Prophase
D
Metaphase
Verified step by step guidance
1
Begin by understanding the stages of mitosis: prophase, metaphase, anaphase, and telophase. Each stage has distinct events that occur within the cell.
In prophase, the chromatin condenses into visible chromosomes, and the mitotic spindle begins to form. The nuclear envelope breaks down, but sister chromatids are not yet aligned at the equator.
During metaphase, the chromosomes align at the cell's equator, also known as the metaphase plate. This is facilitated by the spindle fibers attaching to the centromeres of the sister chromatids.
Motor proteins play a crucial role in metaphase by pulling the sister chromatids toward the equator, ensuring they are properly aligned for the next phase.
In anaphase, the sister chromatids are separated and pulled toward opposite poles of the cell. This is different from metaphase, where they are aligned at the equator.