Which of the following simplified diagrams better shows the changes in the concentrations of three major cyclin-Cdk complexes (G?/S-Cdk, S-Cdk, and M-Cdk) in the cell in different stages of the cell cycle?

Question

Quizplus · Accepted Answer

The G₁/S-Cdk activity (solid black curve) peaks in late G₁ and falls in S phase. The S-Cdk levels (solid gray curve) remain elevated through S and G₁ until early M phase. M-Cdk (dashed gray curve) accumulates before entry into mitosis, but their level falls in mid-mitosis.

Which of the Following Simplified Diagrams Better Shows the Changes