When cyclin binds CDK,
A) the cell transitions from G2 to S.
B) kinase activation occurs.
C) chromosomes condense.
D) the cell quickly enters M phase.
E) the cell undergoes apoptosis.

Question

Quizplus · Accepted Answer

When cyclin binds to CDK, it activates the kinase activity of the complex. This kinase activity is necessary for the progression of the cell cycle through various checkpoints, including the G2/M checkpoint. However, cyclin-CDK complexes do not directly trigger chromosome condensation or apoptosis, nor do they solely cause the cell to transition from G2 to S phase or to quickly enter M phase.

When Cyclin Binds CDK