Cell Cycle
At the center of the cell cycle control system is Cdk, a protein that

manufactures growth factors
is phosphorylated to become active
is only active during mitosis
binds to different cyclins

ANSWER DOWNLOAD EXAMIANS APP

Cell Cycle
The cell cycle is controlled in most cells by

cell size (when the cell reaches a certain size, it divides)
a series of checkpoints
time (after a certain length of time the cell divides)
different cells exhibit different control strategies

ANSWER DOWNLOAD EXAMIANS APP