This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of nucleic acids, Subject name: Biochemistry
[{'content': 'DNA synthesis occurs in phase \nSelect and explain. \nA. G1, B. G2, C. S, D. M', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Cell cycle : In G1 phase , the cell prepares for DNA synthesis. DNA synthesis occurs diring the S (synthesis ) phase of the cell cycle. During the S phase , DNA is completely replicated , but only once. Cell prepares for mitosis in G2 phase, when proteins necessary for daughter cells are synthesized. Then the cell enters into the M phase. Reference : DM.VASUDEVAN.TEXTBOOK SEVENTH EDITION ; PAGE NO :582', 'role': 'assistant'}]