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
All of the following biological reactions are taking place in mitochondria, EXCEPT: 
Select and explain. 
A. Fatty acid oxidation, B. EMP pathway, C. Electron transpo chain, D. Citric acid cycle
B: EMP pathway
Answer: B: EMP pathway 
Explanation: The Embden-Meyerhof pathway: Embedem Meyerhof Parnas (EMP) pathway or glycolysis occurs in cytosol. This is one of three glycolytic pathways used to catabolize glucose to pyruvate and it can function during aerobic respiration, anaerobic respiration, and fermentation. When used during a respiratory process, the electrons accepted by NAD+ are transferred to an electron transpo chain and are ultimately accepted by an exogenous electron acceptor. When used during fermentation, the electrons accepted by NAD+ are donated to an endogenous electron acceptor (eg, pyruvate). Ref: Brooks G.F., Carroll K.C., Butel J.S., Morse S.A., Mietzneron T.A. (2010). Chapter 6. Microbial Metabolism. In G.F. Brooks, K.C. Carroll, J.S. Butel, S.A. Morse, T.A. Mietzneron (Eds), Jawetz, Melnick, & Adelberg's Medical Microbiology, 25e.