Tamilnadu BoardEnglish MediumSTD 11BIO BOTANYCell Cycle3 Marks
Question
Write a note on $G_0$ phase.
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Answer
Some cells exit $G_1$ and enters a quiescent stage called $G_0$, where the cells remain metabolically active without proliferation. Cells can exist for long periods in $G_0$ phase. In $G_0$ cells cease growth with reduced rate of RN A and protein synthesis. The $G_0$ phase is not permanent. Mature neuron and skeletal muscle cell remain permanently in $G_0$. Many cells in animals remains in $G_0$ unless called onto proliferate by appropriate growth factors or other extracellular signals. $G_0$ cells are not dormant.
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