This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: DNA Replication , Subject name: Biochemistry
[{'content': 'DNA replication takes place in which phase of cell cycle - \nSelect and explain. \nA. M, B. G1, C. G2, D. S', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., S o DNA replication (synthesis of DNA) occurs in 'S' phase.Cell cycle consists of:G1 : Presynthetic phase,''intervalS : Synthetic phase (DNA synthesis)G2 : Post synthetic phase/premitotic phase/intervalM : Mitotic phase : Cells are produced which either directly reenter next cycle or pass into non proliferativeG0 phaseG0 : Quiescent stateo There are two resting phases and two active phases in the cycle,o Resting phases - G1 & G2o Active phasesS-phase (synthetic phase) - As the name suggests, synthesis of new DNA takes place, i.e. doubling of DNA occurs.M-phase (mitotic phase) - Mitosis takes place and the daughter cells recieve one copy of DNA. In this phase cell number is doubled.", 'role': 'assistant'}]