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': 'Substrate level phosphorylation in citric acid cycle is catalysed by ? \nSelect and explain. \nA. Pyruvate kinase, B. Phosphoglycerate kinase, C. Malate dehydrogenase, D. Succinate thiokinase', 'role': 'user'}, {'content': 'Answer: D \nExplanation: There are 2 types of phosphorylation of ADP to ATP.1) Substrate level phosphorylation2) Oxidative phosphorylation at respiratory chain levelSubstrate level phosphorylation is the production of ATP at the substrate level without paicipation of ETC.It occurs in TCA cycle and glycolysis', 'role': 'assistant'}]