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Multiple Choice
At which phase of the cell cycle do centrioles begin to move apart in animal cells?
A
Telophase
B
Anaphase
C
Metaphase
D
Prophase
Verified step by step guidance
1
Understand the cell cycle phases: The cell cycle consists of interphase (G1, S, G2) and mitotic phase (M phase). Mitosis is divided into prophase, metaphase, anaphase, and telophase.
Identify the role of centrioles: Centrioles are involved in organizing microtubules during cell division, forming the spindle apparatus that helps separate chromosomes.
Focus on prophase: During prophase, the chromatin condenses into visible chromosomes, and the mitotic spindle begins to form. This is when centrioles start moving apart to opposite poles of the cell.
Compare with other phases: In metaphase, chromosomes align at the cell's equator. In anaphase, sister chromatids are pulled apart. In telophase, the cell prepares to divide into two daughter cells.
Conclude that centrioles begin to move apart during prophase, as this is the phase where the spindle apparatus starts to form, setting the stage for chromosome separation.