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Which one of the following pairs of codons is correctly matched with their function or the signal for the particular amino acid ?A. GUU , GCU - AlanineB. UAG , UGA - StopC. AUG , ACG - Start/ methionineD. UUA, UCA - Leucine |
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Answer» Correct Answer - B The group of nucleotides that specifies one amino acid is a code word or codon . The nucleotides of mRNA are arranged as linear sequence of codons , each codon consisting of three successive nitrogenous bases. Three codons UAG UAA and UGA are the termination codons . they do not code for any of the amino acids. In most oranisms AUG codon is the start or initiation codon , i.e. the polypeptide chain starts either with methionine or N- formylmethionine. Leucine - UUA, UUG,CUU, CUC,CUA,CUG. Alanine - GCU ,GCC ,GCA , GCG. GUU - Valine UCA - Serine. |
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