Match the following events that occur in their respective phases of the cell cycle and select the correct…

Match the following events that occur in their respective phases of the cell cycle and select the correct option:

Column-I Column-II
(a) G1 phase (i) Cell grows and organelle duplication
(b) S phase (ii) DNA replication and chromosome duplication
(c) G2 phase (iii) Cytoplasmic growth
(d) Metaphase in M-phase (iv) Alignment of chromosomes
  1. (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
  2. (a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
  3. (a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
  4. (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)

Solution

Phase Characteristics
G1 phase The cell is metabolically most active, cell size increases and organelle duplication takes place in this phase.
S phase In this phase, DNA replication, i.e. doubling of DNA content, histone and centriole duplication takes place.
G2 phase In this phase, cytoplasmic growth takes place.
Metaphase in M-phase In this stage, chromosomes are highly condensed and the alignment of chromosomes takes place at the metaphasic plate.

Asked in: NEET 2020 (Phase 2)

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