This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
[{'content': 'If there are 4 nucleotides instead of 3 in codon, how many amino acids may be formed ? \nSelect and explain. \nA. 16, B. 21, C. 256, D. 64', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Formula for calculating no. of codons =\xa0(4)n\n\nn = no. of nucleotides that constitute codon.\ne.g. if n = 2; no. of codons = (4)2\xa0= 16\nif n = 3; no. of codons = (4)3\xa0= 64\nif n = 4; no. of codons = (4)4\xa0= 256\nso on', 'role': 'assistant'}]