At the G2-to-M checkpoint, one of the cyclins has reached a concentration great enough to complex with one of the CDKs to initiate DNA synthesis. Which cyclin and which CDK are the ones involved?
a. cyclin M and CDK1
b. cyclin S and CDK1
c. cyclin M and CDK2
d. cyclin S and CDK2
Ans: a. cyclin M and CDK1
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True False