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G0 Phase also called resting phase, it is a period in the cell cycle where cells is in the quiescent state.

The cells is neither dividing nor going to divide in this phase. Due to the lacking of the stimulation of re-enter in the cell cycle, some G0 cells may die alone with organism, but some stay in G0 phase and function in the rest of their living time, and it is able to re-enter to G1 once it gets the signals.The cells keep doing their initial works until  further division( more cells ) is needed. Some type of cells such as Brain calls will never replace itself and stay at G0 stage while some cells like liver cells are triggered back to G1 phase in the cell cycle to replenish the damaged liver cells[1].

References:

  1. Erin Cram, Grad student, Molecular and Cellular Biology, University of California, Berkeley. 1999. MadScience Network.

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