Maturation Promotion Factor (MPF), Discovered by Masui and Markert, Is

Multiple Choice

Maturation promotion factor (MPF) , discovered by Masui and Markert, is the factor that

A) is missing in the cdc2 mutant in yeast.
B) induces entry into meiosis when injected into frog oocytes.
C) fluctuates in amount during early cleavages of sea urchin eggs.
D) fluctuates in amount during the cell cycle of mammalian cells.