Multiple Choice
During mitosis in an animal cell, what happens to the centrioles (within the centrosomes)?
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15. Cytoskeleton and Cell Movement
Microtubules and Cell Division
Multiple Choice
In animal cells, what is the primary role of centrioles during cell division?
A
They help organize the centrosome and nucleate microtubules to form the mitotic spindle.
B
They catalyze the polymerization of actin filaments to create the contractile ring for cytokinesis.
C
They replicate and segregate the cell's DNA by attaching directly to chromatin and pulling sister chromatids apart.
D
They synthesize new nuclear envelope membranes to enclose the daughter nuclei during telophase.
Verified step by step guidance1
Understand the context: The question asks about the primary role of centrioles during cell division in animal cells.
Recall the function of centrioles: Centrioles are cylindrical structures found in the centrosome, which is the main microtubule organizing center in animal cells.
Identify the role of centrioles in microtubule organization: Centrioles help organize the centrosome and nucleate microtubules, which are essential for forming the mitotic spindle.
Connect the mitotic spindle to cell division: The mitotic spindle is responsible for separating sister chromatids during mitosis, ensuring proper chromosome segregation.
Eliminate incorrect options by matching functions: Centrioles do not catalyze actin polymerization (contractile ring formation), do not directly attach to chromatin to pull chromatids apart, and do not synthesize nuclear envelope membranes.
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