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': 'Alpha oxidation of dietary phytanic acid takes place in which of the following cell structures? \nSelect and explain. \nA. ER, B. Golgi apparatus, C. Mitochondria, D. Peroxisomes', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Alpha-oxidation takes place in peroxisomes to break down dietary phytanic acid, which cannot undergo beta-oxidation due to its b-methyl branch, into pristanic acid, which can. Alpha oxidation (a-oxidation) is a process by which ceain fatty acids are broken down by removal of a single carbon from the carboxyl end.', 'role': 'assistant'}]