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
Which biochemical reaction does not occur in the mitochondria: 
Select and explain. 
A. Kreb's cycle, B. Urea cycle, C. Gluconeogenesis, D. Fatty acid synthesis
D: Fatty acid synthesis
Answer: D: Fatty acid synthesis 
Explanation: D i.e. Fatty acid synthesis