What happens when MPF mitosis- promoting factor) is introduced into immature frog oocytes that are arrested in G₂? A) Cell differentiation is triggered. B) The cells enter mitosis. C) Fertilization occurs. D) Nothing happens.

Question

Quizplus · Accepted Answer

MPF (mitosis-promoting factor), also known as cyclin-dependent kinase 1 (CDK1) combined with cyclin B, triggers the entry of cells into mitosis. Immature frog oocytes, which are arrested in G₂, cannot undergo mitosis until they receive the necessary cues to progress through the cell cycle. Therefore, when MPF is introduced into these oocytes, it can activate CDK1 and drive the oocytes into mitosis. Hence, choice B is the correct option.

What Happens When MPF Mitosis- Promoting Factor) Is Introduced into Immature