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': 'Mitochondria gene (True statement)a) Paternal transmissionb) Maternal transmissionc) Mendelian inheritanced) Mitochondrial myopathy \nSelect and explain. \nA. c, B. bd, C. ab, D. ac', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Mitochondrial DNA is always maternally inherited.\nImportant mitochondrial diseases are\xa0mitochondrial encephalomyopathy with lactic acidosis and stroke-like episodes (MELAS),\xa0Leber hereditary optic neuropathy, myoclonic epilepsy with ragged-red fibers, Leigh syndrome,\xa0Pearson syndrome, keams-sajre syndrome, chronic progressive external ophthalmoplegia and NARP (neurogenic weakness with ataxia & retinitis pigmentosa).', 'role': 'assistant'}]