<prompt> Transition from G2 to M phase of the cell cycle is controlled by -Retinoblastoma gene productp53 proteinCyclin ECyclin B  <response>: o Resting cells are in G0 phase of cell cycle and need to be recruited into the G, stage and beyond in order to replicate. The entry and progression of cells through the cell cycle is controlled by changes in levels and activities of cyclins and cyclin dependent kinases CDKs, and their inhibitors. 