In which of the following phase DNA / chromosome replication takes place?
A
G1-phase
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B
G2-phase
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C
S-phase
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D
Prophase
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Solution
The correct option is A S-phase
The cell cycle consists of 2 phases, the mitotic phase, and interphase.
The interphase is divided into the first growth phase (G1phase), synthesis phase (S phase) and second growth phase (G2 phase). G1(Gap 1) is the phase where a large amount of protein synthesis occurs required for the DNA replication and the volume of the cytoplasm increases.
The S phase stands for the synthesis phase in which DNA replication occurs followed by synthesis of histones. G2phase is a period of rapid cell growth and protein synthesis, during which the cell prepares itself for mitosis.