Biology · Cell Biology

During the cell cycle, entry into the S-phase is tightly regulated. This is possible because: A. APC/C promotes ubiquitination of S-phase cyclins and mitotic cyclins, marking them for proteolysis at the mitotic exit. B. Cyclin B1 helps in the activation of S-phase CDKs only in late G1. C. As mitotic CDK activity declines in late mitosis, cdc14 phosphatase activates APC/C by dephosphorylating Cdh1, thus promoting formation of APC/CCdh1. D. Securin keeps S-phase cyclins in an inactive state till late G1. Which one of the options represents all correct statements?

Verified Solution4 OptionsUpdated: October 2026👁️1 View

Correct answer

A and C

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