Multiple Choice
In animal cells, the mitotic spindle arises primarily from which cell structure?
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15. Cytoskeleton and Cell Movement
Microtubules and Cell Division
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During mitosis, what is the primary role of spindle fibers (microtubules) in cell division?
A
They synthesize the nuclear envelope and reassemble it around chromosomes at the start of mitosis.
B
They form a rigid cell wall plate that separates the cytoplasm into two daughter cells.
C
They replicate the cell’s DNA during S phase to ensure each daughter cell receives a complete genome.
D
They attach to kinetochores and move sister chromatids to opposite poles of the cell.
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