This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
[{'content': 'Which enzyme joins two substrates? \nSelect and explain. \nA. Lyase, B. Ligase, C. Isomerase, D. Synthase', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., LigaseAn enzyme which joins two substrates in an energy dependent process is called ligase.Ligases ligate or bind two compounds together by creating a new chemical bond. A source of energy is required, usually ATP, Example are synthatases, carboxylases.", 'role': 'assistant'}]