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': 'Cardiolipin is an impoant component of which of the following: \nSelect and explain. \nA. Mitochondria, B. Cell membrane, C. Ribosome, D. All of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Phosphatidic acid is a precursor of phosphatidyl-glycerol which, in turn, gives rise to cardiolipin. This phospholipid is found only in mitochondria and is essential for mitochondrial function. Ref: Harper 28th edition, chapter 16.', 'role': 'assistant'}]