So basically in this phase our chromosome unwinds and uncoils into Uchromatin and the Uchromatin is used to produce RNA that is used to synthesize the proteins that are needed by the cell and those proteins are used to synthesize the many organelles and the different types of cell machinery that are needed for the cell survival. So the G One phase is the phase where we produce the majority of the organelles and the proteins that are used by the cell. And as a result the cell basically increases in size. In fact the cell doubles in size during the phase known as the G One phase. Now towards the end of the G One phase is a checkpoint known as the restriction point. And if the conditions are favorable and if the requirements have been met by the cell, the cell can basically commit itself to the process of cell division by exiting the G One phase and entering the next phase of interface known as the F phase.