This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Microbiology
[{'content': 'Aminoacyl - tRNA is required for all Except \nSelect and explain. \nA. Hydroxyproline, B. Methionine, C. Cystine, D. Lysine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Hydroxyproline is a derived amino acid and there is no tRNA available to transpo derived amino acids.Hydroxyproline and hydroxylysine are two examples of derived amino acid for which there is no t-RNA available.', 'role': 'assistant'}]