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?
s
m
g1
g2
g0

Explanation:

The cell cycle has several checkpoints. The G1 checkpoint is the first one. If a cell does not pass the G1 checkpoint, it will exit the cell cycle and enter the G0 phase (a quiescent state). The S checkpoint checks for DNA damage during DNA synthesis. The G2 checkpoint ensures DNA is properly replicated before mitosis. The M checkpoint monitors spindle - microtubule attachment during mitosis.

Answer:

G1