객관식
During which phase of mitosis are sister chromatids separated?
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11. Cell Division
Phases of Mitosis
객관식
What is the primary role of spindle fibers during mitosis?
A
To initiate cytokinesis
B
To separate sister chromatids by pulling them apart
C
To replicate DNA before cell division
D
To form the nuclear envelope
검증된 단계별 안내1
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 involves several stages: prophase, metaphase, anaphase, and telophase.
Identify the role of spindle fibers: Spindle fibers are structures that form during cell division. They are composed of microtubules and are crucial for the movement of chromosomes.
Focus on the specific stage of mitosis: During anaphase, spindle fibers play a critical role. They attach to the centromeres of sister chromatids, which are identical copies of a chromosome connected by a centromere.
Explain the action of spindle fibers: The spindle fibers shorten, pulling the sister chromatids apart toward opposite poles of the cell. This ensures that each daughter cell will receive an identical set of chromosomes.
Conclude the primary role: The primary role of spindle fibers during mitosis is to ensure the accurate separation of sister chromatids, which is essential for the equal distribution of genetic material to the daughter cells.
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