Which of the following molecules triggers the cell's passage past the G₂ checkpoint into mitosis? A) PDGF B) MPF C) cyclin D) Cdk

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MPF (mitosis-promoting factor) triggers the cell's passage past the G2 checkpoint into mitosis. It is a complex of cyclin and Cdk (cyclin-dependent kinase) that phosphorylates various target proteins, leading to chromatin condensation, spindle assembly, and other events necessary for the onset of mitosis.

Which of the Following Molecules Triggers the Cell's Passage Past