A dividing eukaryotic cell is treated with a drug that inhibits the activity of the spindle-attachment checkpoint.At which cell cycle stage would you predict that the cell would be blocked? A)G₁ B)S C)G₂ D)Mitosis (metaphase) E)Mitosis (telophase)

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Quizplus · Accepted Answer

The spindle-attachment checkpoint ensures that all chromosomes are properly attached to the spindle fibers before the cell proceeds to metaphase of mitosis. If this checkpoint is inhibited, the cell will proceed to metaphase without proper attachment of all chromosomes, resulting in an arrest at that stage. Therefore, the cell would be blocked in mitosis (metaphase).

A Dividing Eukaryotic Cell Is Treated with a Drug That