Q17 / 180 · NEET 2020 (Phase 1) · Botany

Identify the correct statement with regard to G1 phase (Gap 1) of interphase.

  • A
    Reorganisation of all cell components takes place.
  • Correct answer
    B
    Cell is metabolically active, grows but does not replicate its DNA.
  • C
    Nuclear Division takes place.
  • D
    DNA synthesis or replication takes place.

Solution

G1 Phase: G1 phase is the interval between mitosis and initiation of DNA replication. In this phase, the cell does not synthesize or, replicate DNA but remains metabolically active. The cell grows in size continuously and synthesizes nucleotides, ATP, proteins, amino acids, RNAs etc. (required during S phase). The length of the G1 phase varies from one cell to another. If a cell divides frequently, then it has a shorter G1 phase and if a cell does not divide frequently, then it has a longer G1 phase. Replication of DNA and duplication of histones takes place in S phase.

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

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