Regulation of Cell Cycle

AP Biology· difficulty 3/5

MPF (maturation-promoting factor / M-phase-promoting factor) is a cyclin-CDK complex that

A
$Activates caspases that directly execute apoptosis$
B
$Dephosphorylates substrates that drive entry into G₁$
C
$Replicates DNA at origins during S phase$
D
$Phosphorylates targets that drive entry into mitosis$
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Explanation

MPF (cyclin B + CDK1) is a master regulator of mitotic entry — drives chromosome condensation and nuclear envelope breakdown.

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