This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Mutations & Codons, Subject name: Biochemistry
[{'content': 'Assume 4 nucleotides code for an amino acid. What is the number of amino acids coded possible? \nSelect and explain. \nA. 4, B. 16, C. 24, D. 256', 'role': 'user'}, {'content': 'Answer: D \nExplanation: This question is based on an assumption: 1 nucleotide code- 4 amino acids 2 nucleotide code - 4 x 4 = 16 amino acids 3 nucleotide code - 4 x 4 x 4= 64 amino acids 4 nucleotide code - 4 x 4 x 4 x 4 = 256 amino acids', 'role': 'assistant'}]