<prompt> Radiosensitive stage of cell cycleG2MSG1  <response>: Radiation and cell cycle M phase followed by g2-m interphase is when the cell is radiosensitive. g2m interphase G2 M The cell is vulnerable to radiation in the stage of mitosis m, less so during synthesis s and relatively insensitive during resting periods.Four impoant processes that occur after radiation exposure can be summarized as the four r;s of radiobiologyThe first is repair. Repair is temperature dependent and is thought to represent the enzymatic mechanisms for healing intracellular injury.The second r is reoxygenation, a process whereby oxygen and other nutrients are actually better distributed to ble cells following radiation injury and cell killingthe third r is repopulation, the ability of the cell population to continue to divide and to replace dying and dead cells.The fouh r is redistribution, which reflects the variability of a cell;s radiosensitivity over the cell cycle.Ref: Principles of radiation therapy by Deeley, 27; Harrison;s principles of internal medicine 16th edition, 435 