MCQ
Between mitosis, a cell is said to be in the:
- AResting stage
- BSleeping stage
- CActive stage
- DNone of the above
Explanation:
Interphase is a complex of changes that occur in a newly formed cell before it is able to divide.
Interphase is also called preparatory phase, inter-mitosis or energy phase.
Previously, it was known as a resting phase.
It is characterized by three substages, G1 (growth phase 1 or gap 1), S (synthesis) and G2 (growth phase 2 or gap 2). It is an active part of a cell's life cycle and in G1 many metabolic reactions occur including protein synthesis.
During S phase, DNA replication occurs and G2 is marked by synthesis of RNA and proteins.
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| Column $I$ | Column $II$ |
| $a.$ Weedicide | $(i)$ $GA_3$ |
| $b.$ Bolting | $(ii)$ Cytokinin |
| $c.$ Thinning of cotton | $(iii)$ Ethylene |
| $d.$ Lateral shoot growth | $(iv)$ $2$, $4-D$ |