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 in the genetic code consists of: \nSelect and explain. \nA. One molecule of charged-tRNA, B. A Shine-Dalgarno sequence, C. Three consecutive nucleotides, D. Two complementary base pairs', 'role': 'user'}, {'content': 'Answer: C \nExplanation: A codon is a triplet sequence of bases. The tRNA molecule contains an anticodon. The Shine-Dalgarno sequence is found in the 23S prokaryotic ribosomal RNA. A codon is on the same strand of DNA or mRNA.', 'role': 'assistant'}]