During G0 phase of cell cycle
a} Cells remain metabolically inactive
b}Cells do not proliferate unless they are called on to do so
c}Cells cannot divide even occasionally just to replace the cells lost due to injury
d}oth (1) and (2)
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Some cells in an adult animal do not divide, e.g., nerve cells, whereas many cells divide occasionally just to replace the cell loss due to injury or cell death.
Such type of cells remains in G
0
phase. The G
0
phase of the cell cycle is also known as the quiescent stage.
In this phase, the cell remains metabolically active but do not proliferate unless they are called on to do so.
Cells in G
0
phase of the cell cycle, suspend cell cycle for some time but they do not fully terminate the cell cycle.
When a cell enters the G0 phase, they exit the cell cycle. “Entering G0 Phase” is essentially synonymous with “exiting the cell cycle”.
Hence, the correct answer is A.
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