This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of protein and amino acid, Subject name: Biochemistry
[{'content': 'Tyrosine enters gluconeogenesis by forming which substrate \nSelect and explain. \nA. Succinyl CoA, B. Alpha - ketoglutarate, C. Fumarate, D. Citrate', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Sources of Gluconeogenesis uGluconeogenesis is the process by which glucose molecules are produced from non-carbohydrate precursors. uNon carbohydrate precursors include lactate, glucogenic amino acids, glycerol pa of fat and propionyl CoA derived from odd chain fatty acids. DM Vasudevan , Textbook of Biochemistry for Medical Students , 7th ed, page 119', 'role': 'assistant'}]