Question

which is the first checkpoint in the cell cycle that will cause a cell to exit the cycle if this point is not passed? g₁ g₀ m g₂ s

Explanation:

The cell cycle has several checkpoints. The G1 checkpoint is crucial. If a cell doesn't pass the G1 checkpoint (due to factors like DNA damage or lack of nutrients), it exits the cell cycle and enters the G0 phase (a non - dividing state). The G0 phase is not a checkpoint but a resting state. The S phase is for DNA synthesis, the G2 checkpoint checks DNA replication and cell size before mitosis (M phase). The M checkpoint ensures proper chromosome attachment during mitosis.

Answer:

G1