At what stage of the eukaryotic cell cycle do key protein kinases, like cyclin-dependent kinase, become activated to allow for DNA replication initiation?
A)right after mitosis
B)right before mitosis
C)just before the start of S phase
D)in the middle of the G2 phase
E)in the G0 phase

Question

Quizplus · Accepted Answer

Cyclin-dependent kinase and other key protein kinases become activated just before the start of S phase to initiate DNA replication. This is the checkpoint where the cell makes sure all necessary cellular machinery is ready before committing to replicating its DNA.

At What Stage of the Eukaryotic Cell Cycle Do Key