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There are 64 codons and 20 amino acids. Which of the following is true?. . A. Several different codons can specify the same amino acid.. . B. Each codon specifies a different amino acid.. . C. Some amino acids have no link to a codon.. . D. Each amino acid is specified by only one codon..

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meerkat18
There are 4 nitrogen used in the construction of codon. Each codon is composed of 3 bases. Hence there are 4^3 or 64 codons available. In this case, we combination is distinguishable from one to another and represents another thread of amino acid. Answer is A.