If a given protein's level peaks early in G₁, but is absent before the G₂transition, what can be inferred about its possible role in regulating the cell cycle? A) This protein inhibits S-phase Cdks. B) This protein activates S-phase Cdks. C) This protein inhibits G1/S Cdks. D) This protein activates G1/S Cdks. E) This protein is involved in DNA synthesis.

Question

Quizplus · Accepted Answer

This protein peaks early in G1 and is absent before the G1/S transition, suggesting it plays a role in preparing the cell to enter S phase. Activating G1/S cyclin-dependent kinases (Cdks) is consistent with this role, as these enzymes are crucial for the transition from G1 phase to S phase in the cell cycle.

If a Given Protein's Level Peaks Early in G1, but Is

If a Given Protein's Level Peaks Early in G₁, but Is