Aminoacyl - tRNA is required for all Except: (A) Hydroxyproline, (B) Methionine, (C) Cystine, (D) Lysine
Answer is A. 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.