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': 'How many base pairs are encoded by a prokaryotic polypeptide of 250 amino acids? \nSelect and explain. \nA. 250 bp, B. 500 bp, C. 750 bp, D. 1000 bp', 'role': 'user'}, {'content': 'Answer: C \nExplanation: A prokaryotic DNA does not contain any introns and the base sequence is exactly collinear with the amino acid sequence of proteins. Each amino acid is represented by a 3 base codon, therefore 250 amino acid protein will require 750 base pairs (250 x 3 = 750).', 'role': 'assistant'}]