What is the result of a cell not meeting the criteria to pass the G₁ checkpoint? A) The cell cycle halts. B) The cell may enter the G₀ stage. C) The cell may undergo apoptosis. D) All of these. E) None of these.

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If a cell does not meet the criteria to pass the G₁ checkpoint, there are multiple outcomes possible. The cell cycle may halt, giving the cell time to repair damaged DNA before continuing. Alternatively, the cell may enter the G₀ stage, which is a step back in the cell cycle, to allow time for repairs. If the damage is too severe to repair, the cell may undergo apoptosis, programmed cell death. Therefore, all of these outcomes are possible if the checkpoint criteria are not met.

What Is the Result of a Cell Not Meeting the Criteria