AIIMS 2018 Biology Phases of Cell Cycle MCQ Question
In the somatic cell cycle
In G₁ phase, DNA content is double the amount of DNA present in the original cell.
DNA replication takes place in S⁻phase
A short inter-phase is followed by a long mitotic phase.
G₂ phase follows mitotic phase.
Correct Answer
Detailed Explanation
DNA replication occurs during the S-phase of the somatic cell cycle, where each chromosome is duplicated, resulting in two sister chromatids per chromosome. Option A is incorrect because, in the G₁ phase, the DNA content is the same as the original cell, not double. Option C is misleading as interphase (which includes G₁, S, and G₂ phases) is typically longer than the mitotic phase. Option D is incorrect because the G₂ phase occurs after the S-phase and before mitosis, not after the mitotic phase.
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