Question

Which of the chains of amino acids corresponds to the nucleotide sequence aauggcuac

Answer 1

The sequence AAU GGC UAC is composed of three codons each of which codes for a different amino acid. AAU codes for the amino acid called threonine. GGC codes for the amino acid called glycine UAC codes for the amino acid called tyrosine. So the chain will read  threonine-glycine-tyrosine. There are 64 possible 3 - letter combinations of DNA coding units A, C, G and T. Of these, there are three stop or non- sense codons that do not code for any amino acid, while the remaining 61 code for different amino acids.