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Cell Cycle and Cell Division — BIOLOGY STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYCell Cycle and Cell Division2 Marks
Question
Name three phases of interphase. Give one major event of each phase.
✓

Answer

Three main events that occur in interphase are
$\mathrm{G}_1$-phase (post-mitotic or pre-synthetic phase), S-phase (synthesising phase) and $\mathrm{G}_2$-phase (postsynthetic or pre-mitotic phase).
Major events of each phase are:
i. $\mathrm{G}_1$-phase is the longest phase during which synthesis of RNA and DNA takes place.
ii. S-phase is the phase during which chromosomes replicates and prepare themselves for equal distribution.
iii. $\mathrm{G}_2$-phase, is the phase in which synthesis of DNA gets stopped. However, formation of RNA takes place.

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