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
TCA cycle does not take place in: 
Select and explain. 
A. Hepatocyte, B. Osteocyte, C. Neuron, D. Erythrocyte
D: Erythrocyte
Answer: D: Erythrocyte 
Explanation: D i.e. ErythrocytesErythrocytes (RBC) lack mitochondria (so TCA cycle enzymes) and completely rely on glucose as their metabolic fuel. They metabolize it by anaerobic glycolysisQ.