This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Translation, Subject name: Biochemistry
[{'content': 'In translation process , proof reading of mRNA is done by : \nSelect and explain. \nA. RNA polymerase, B. Amino - acyl-t - RNA synthetize, C. Leucine zipper, D. DNA', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. is \'b\' Amino acyl-t- RNA synthetase : Aminoacyl - tRNA synthetase :"This family of enzymes is required for attachment of amino acids to their corresponding tRNAs. Each member of this family recognized a specific amino acid and the tRNA that correspond to that amino acid. Each amino acyl - tRNA synthetase catalyzes a two-step reaction that results in the covalent attachment of an amino acid to its corresponding tRNA . The extreme specificity of the synthetase in recognising these two structures is largely responsible for the high fidelity of translation of the genetic message". - Lippincott, 2/e.', 'role': 'assistant'}]