When the cyclin‒CDK complex phosphorylates RB,the cell cycle progresses from _______ to _______.
A) G1 phase;G2 phase
B) G2 phase;prophase
C) G1 phase;S phase
D) S phase;prophase
E) metaphase;anaphase

Question

Quizplus · Accepted Answer

When the cyclin‒CDK complex phosphorylates RB, it frees the transcription factor E2F, which allows the cell to progress from G1 phase to S phase, where DNA replication takes place. Therefore, the cell cycle progresses from G1 phase to S phase when RB is phosphorylated.

When the Cyclin‒CDK Complex Phosphorylates RB,the Cell Cycle Progresses from _______