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
Mature RBC contains all except - 
Select and explain. 
A. Enzyme of HMP shunt pathway, B. Enzyme of TCA cycle, C. Glycoytic enzymes, D. Pyridine nubleotides
B: Enzyme of TCA cycle
Answer: B: Enzyme of TCA cycle 
Explanation: 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.