This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Chemistry of Nucleotides , Subject name: Biochemistry
[{'content': 'Which is non-sense codon - \nSelect and explain. \nA. UGG, B. AUG, C. UGA, D. CCA', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., UGA Stop codons or nonsense codons or termination codonso Three of the 64 possible nucleotide triplets UAA (amber), UAG (Ochre) and UGA (opal) do not code for any amino acid.o They are called nonsense codons that normally signal termination of polypeptide chains.o Thus, though there are 64 possible triplet codons, only 61 codes for 20 amino acids (as remaining three are non-sense codons).", 'role': 'assistant'}]