Retinoblastoma gene regulates-: (A) Gi - S phase, (B) G2 - M phase, (C) Go - S1 phase, (D) S - G1 phase
Answer is A. Ans. is 'a' i.e., G1- S phaseo Phosphorylation of RB is a molecular "On-off' switch for cell cycle.o It regulates cell cycle at G,- S phase (has been explained in details in previous explanations).