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  4. The first codon discovered by Nirenberg and Mathai was :

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Q. The first codon discovered by Nirenberg and Mathai was :

Haryana PMTHaryana PMT 2003

Solution:

Marshall Nirenberg and Heinrich J. Matthaei were the first to elucidate the nature of a codon in 1961 at the National Institutes of Health. They used a cell-free system to translate a poly-uracil RNA sequence and discovered that the polypeptide that they had synthesized consisted of only the amino acid phenylalanine. They thereby deduced that the codon UUU specified the amino acid phenylalanine.