From which structure does the mitotic spindle arise?

From which structure does the mitotic spindle arise?

• A. Centrosomes.
• B. Golgi apparatus.
• C. Mitochondria.
• D. Ribosomes.

Answer: (A)

The mitotic spindle forms from centrosomes, which act as the main microtubule organizing centers in many animal cells. They duplicate and move to opposite poles during early mitosis, organizing the assembly of microtubules into the spindle that Attach to chromosomes at kinetochores and drive their separation during anaphase. Other structures like the Golgi apparatus, mitochondria, and ribosomes have roles in trafficking, energy production, and protein synthesis, not in organizing spindle microtubules.

The mitotic spindle forms from centrosomes, which act as the main microtubule organizing centers in many animal cells. They duplicate and move to opposite poles during early mitosis, organizing the assembly of microtubules into the spindle that Attach to chromosomes at kinetochores and drive their separation during anaphase. Other structures like the Golgi apparatus, mitochondria, and ribosomes have roles in trafficking, energy production, and protein synthesis, not in organizing spindle microtubules.