Question

inhibitors of microtubule synthesis inhibit mitosis by preventing the formation and function of the:
○ kinetichore
○ septum
○ spindle
○ contractile ring
○ chromosomes

Explanation:

• Kinetichores are protein structures on chromosomes that attach to spindle microtubules, not made of microtubules themselves.
• A septum is a cell wall structure for cell division in some organisms, unrelated to microtubules.
• The mitotic spindle is composed of microtubules; inhibiting microtubule synthesis stops spindle formation, halting mitosis.
• The contractile ring is made of actin filaments, not microtubules.
• Chromosomes are made of DNA and proteins, not microtubules.

Answer:

spindle