MediumBotany
+4 / -1
Which checkpoint ensures DNA replication is complete before mitosis begins?
A
G2/M checkpoint
B
G1/S checkpoint
C
Spindle assembly checkpoint
D
G0 checkpoint
Explanation
The G2/M checkpoint (also called the DNA damage checkpoint in G2) ensures that DNA replication is complete and any DNA damage is repaired before the cell enters mitosis. If DNA is incompletely replicated or damaged, CDK1/Cyclin B activity is inhibited, halting cell cycle entry into M phase.
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