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': 'The difference between gram +ve and gram -ye organism is the gram -ve organism contains: \nSelect and explain. \nA. Teichoic acid, B. Muramic acid, C. N-acetyl neuraminic acid, D. Aromatic amino acids', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. (d) Aromatic amino acids Ref. Ananthanarayan Cell Wall Features Gram positive Gram negative bacteria Plasmolysis Thickness (Peptidoglycan) Variety of amino acids Aromatic and sulphur containing amino acids Lipids Teichoic acid Late Thicker Few Absent Absent or scant Present Early Thinner Several Present Present Absent', 'role': 'assistant'}]