In the absence of growth factor, most animal cells will stop the cell cycle at a restriction point in what stage? A) S phase B) M phase C) G₂ phase D) G₁ phase

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Quizplus · Accepted Answer

The restriction point is located in the late G1 phase and is also called the G1 checkpoint. It ensures that the cell is large enough, has enough nutrients and energy, and lacks DNA damage before entering S phase. If the conditions are not met, the cell will stop the cell cycle at the restriction point and enter a quiescent state called G0 phase. M phase refers to the mitotic phase where cell division occurs, and G₂ phase does not exist in the cell cycle.

In the Absence of Growth Factor, Most Animal Cells Will