Final answer:
True. Different cyclins bind to different Cdks based on the specific cell cycle phase they regulate.
Step-by-step explanation:
True.
Cyclins and cyclin-dependent kinases (Cdks) are responsible for regulating the cell cycle and advancing the cell to the next phase. Different cyclins and Cdks bind at specific points in the cell cycle and regulate different checkpoints. Each cyclin/Cdk pair has been coopted in evolution to monitor different cell cycle events and catalyze phosphorylation of phase-specific proteins.
For example, in the early G1 phase of the cell cycle, the cyclin D-Cdk4/6 complex is active, while in the late G1 phase, the cyclin E-Cdk2 complex is active. Different cyclins bind to different Cdks based on the specific cell cycle phase they regulate.