Q17 / 180 · NEET 2020 (Phase 2) · Botany

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

  • A
    (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
  • B
    (a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
  • C
    (a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
  • Correct answer
    D
    (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.

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

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