A drug, colchicine, can be added to cells in culture and it stops the polymerization of microtubules. What effect would this have on mitosis?
A. It would slow or block mitosis by interfering with the spindle apparatus function.
B. It would speed up mitosis by increasing the rate of DNA replication.
C. It would speed up mitosis by increasing the elongation rate of the dividing cell.
D. It would slow or block mitosis by preventing DNA replication.
Answer: A
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