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': 'Enzyme used in PCR is \nSelect and explain. \nA. Reverse transcriptase, B. Taq polymerase, C. RNA polymerase, D. None', 'role': 'user'}, {'content': 'Answer: B \nExplanation: In step 3 i.e polymerization : New DNA strands are synthesized by Taq polymerase. This enzyme is derived from bacteria Thermus acquaticus that are found in hot springs.Therefore the enzyme is not denatured at high temperature. REFERENCE : DM.VASUDEVAN.TEXTBOOK; SEVENTH EDITION; PAGE NO :638.', 'role': 'assistant'}]