Which of the following statements best describes what happens to MPF during mitosis?
A) It is completely degraded.
B) It is phosphorylated by a Cdk, which inactivates it.
C) The cyclin component of MPF is degraded.
D) The Cdk component of MPF is degraded.

Question

Quizplus · Accepted Answer

MPF (M-phase promoting factor) is composed of a cyclin and a cyclin-dependent kinase (Cdk). During mitosis, the cyclin component of MPF is targeted for degradation, which leads to the inactivation of MPF activity, allowing the cell to exit mitosis. The Cdk component is not degraded but is instead recycled and can form new MPF complexes when associated with new cyclin molecules in the next cell cycle.

Which of the Following Statements Best Describes What Happens to MPF