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: Microbiology
[{'content': 'Acid fastness of tubercle bacilli is attributed to ? \nSelect and explain. \nA. Presence of mycolic acid, B. Integrity of cell wall, C. Both of the above, D. None of the above', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Both of the above Acid fastness has been ascribed variously to the presence in the bacillus of the unsaponifiable wax (mycolic acid) or to a semipermeable membrane around the cell. It is related to the integrity of the cell wall and appears to be a propey of lipid-rich waxy cell wall. Acid fastness is not a propey of lipids alone but depends also on the integrity of the cell wall. - Ananthanarayan", 'role': 'assistant'}]