In the cell cycle,controlled degradation of regulatory proteins occurs via the A)P₄₅₀-protease pathway. B)cyclin-Cdk pathway. C)ubiquitin-proteasome pathway. D)kinase inhibition pathway. E)PI3K-Akt pathway.

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The ubiquitin-proteasome pathway is responsible for the controlled degradation of regulatory proteins during the cell cycle. This system tags proteins with ubiquitin, marking them for degradation by the proteasome, thus regulating the concentration of specific proteins crucial for cell cycle progression.

In the Cell Cycle,controlled Degradation of Regulatory Proteins Occurs Via