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Multiple Choice
What is the role of the spindle during mitosis?
A
To replicate the DNA before cell division
B
To separate sister chromatids and move them to opposite poles of the cell
C
To form the nuclear envelope around the chromosomes
D
To condense the chromatin into visible chromosomes
Verified step by step guidance
1
Understand the process of mitosis: Mitosis is a type of cell division that results in two daughter cells each having the same number and kind of chromosomes as the parent nucleus. It involves several stages: prophase, metaphase, anaphase, and telophase.
Identify the role of the spindle apparatus: The spindle is a structure composed of microtubules that forms during cell division. Its primary function is to ensure that chromosomes are accurately separated into the two daughter cells.
Focus on anaphase: During anaphase, the spindle fibers shorten, pulling the sister chromatids apart. This is crucial for ensuring that each daughter cell receives an identical set of chromosomes.
Clarify the incorrect options: Replicating DNA occurs during the S phase of the cell cycle, not during mitosis. The nuclear envelope forms around chromosomes during telophase, and chromatin condenses into visible chromosomes during prophase.
Conclude with the correct role: The spindle's role during mitosis is to separate sister chromatids and move them to opposite poles of the cell, ensuring proper chromosome distribution.