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': 'Mature RBC contains all except - \nSelect and explain. \nA. Enzyme of HMP shunt pathway, B. Enzyme of TCA cycle, C. Glycoytic enzymes, D. Pyridine nubleotides', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans:B .) Enzymes of TCA cycle Erythrocytes (RBC) lack mitochondria (so TCA cycle enzymes) and completely rely on glucose as their metabolic fuel. They metabolize it by anaerobic glycolysis.', 'role': 'assistant'}]