The critical checkpoints that control the cell cycle are the A) M to G₁ stage and G₂ to M stage. B) S to G₂ stage and G₂ to M stage. C) G₁ to S stage and G₂ to M stage. D) M to G₁ stage and S to G₂ stage.

Question

Quizplus · Accepted Answer

The critical checkpoints that control the cell cycle are the ones that ensure DNA integrity and proper progression of the cycle. The first checkpoint is at G₁ stage, where the cell checks if it has enough resources, DNA damage, and environmental signals to proceed into the S phase. The second checkpoint is at G₂ to M stage, where the cell checks if DNA replication is complete and that the cell is ready to divide. Therefore, option C is the best choice as it correctly identifies both the critical checkpoints that control the cell cycle - G₁ to S stage and G₂ to M stage.

The Critical Checkpoints That Control the Cell Cycle Are the