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Multiple Choice
What occurs during the anaphase of mitosis?
A
The cell grows and duplicates its DNA.
B
The nuclear envelope re-forms around each set of chromosomes.
C
Chromosomes align at the cell's equatorial plane.
D
Sister chromatids are pulled apart to opposite poles of the cell.
Verified step by step guidance
1
Understand the context of mitosis: Mitosis is a process of cell division that results in two genetically identical daughter cells from a single parent cell. It consists of several stages: prophase, metaphase, anaphase, and telophase.
Identify the stage of interest: Anaphase is the third stage of mitosis, following metaphase, where chromosomes are aligned at the cell's equatorial plane.
Recognize the key event in anaphase: During anaphase, the sister chromatids, which are identical copies of a chromosome, are separated and pulled towards opposite poles of the cell.
Explain the mechanism: The separation of sister chromatids is facilitated by the spindle fibers, which are structures that attach to the centromeres of the chromatids and shorten, pulling them apart.
Conclude the process: As the sister chromatids are pulled to opposite poles, the cell prepares for the final stage of mitosis, telophase, where the nuclear envelope re-forms around each set of separated chromatids, now individual chromosomes.