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': 'A codon consists of - \nSelect and explain. \nA. One molecule of amono acyl-t RNA, B. Two complementary base pairs, C. 3 consecutive nucleotide units, D. 4 individual nucleotides', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. 3 consecutive nucleotide units', 'role': 'assistant'}]