This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: general microbiology, Subject name: Microbiology
[{'content': 'Bacterial cell wall is composed of all except -? \nSelect and explain. \nA. Muramic acid, B. Teichoic acid, C. Glucosamine, D. Mucopeptide', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Bacteria are usually single-celled, except when they exist in colonies. ... The major component of the bacterial cell wall is peptidoglycan or murein. This rigid structure of peptidoglycan, specific only to prokaryotes, gives the cell shape and surrounds the cytoplasmic membrane. Ref:Ananthanarayan & panikers Textbook of microbiology 9th edition page no 15,16', 'role': 'assistant'}]