Q4 / 180 · AIIMS 2012 · Botany

Which of the following statements is incorrect about $\mathrm{G}_0$ phase?

  • Correct answer
    A
    Mitosis occurs after $G_0$ phase.
  • B
    Biocatalysts can be used to exit $\mathrm{G}_0$ phase.
  • C
    Cell volume keeps on increasing during this phase.
  • D
    Cell metabolism occurs continuously in $\mathrm{G}_0$ phase.

Solution

$G_0$ phase is the stage of inactivation of cell cycle due to non-availability of mitogens and energy rich compounds. The cells in this phase remain metabolically active and usually grow in size assuming particular shape (cell differentiation). Cell enters $G_0$ phase from a cell cycle checkpoint in the $G_1$ phase. $G_1$ phase checkpoint (restriction point) takes the key decision whether the cell should divide, delay division or enter resting stage. Cells then remain in $G_0$ phase until there is a reason for them to divide. Several biocatalysts can help a cell in $\mathrm{G}_0$ phase to proceed through cell division when required.

Hence, the correct answer is option: 'A'.

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