Final answer:
Cyclin-Dependent Kinases (CDKs) encourage a cell to continue its cell cycle, while Maturation-Promoting Factors (MPFs) signal the cell to enter the M phase of the cycle. The correct answer is that CDKs tell the cell to continue the cell cycle, and MPFs promote the cell to enter M phase, which is option c.
Step-by-step explanation:
Cyclin-Dependent Kinases (CDKs) are crucial enzymes in cell cycle regulation. Their primary role is to continue the cell cycle, as they work to push the cell past various checkpoints. Specifically, they activate other proteins through phosphorylation, which in turn advances the cell cycle. Maturation-promoting factor (MPF), another key regulator, promotes the cell to enter the M phase, or mitosis. MPFs function is to signal the commencement of cellular division processes.
Thus, the correct answer to the student's question is: Cyclin-Dependent Kinases (CDKs) tell the cell to continue the cell cycle, and Maturation-Promoting Factor (MPFs) tell/promote the cell to enter M phase. This corresponds to option (c) Continue, enter.