Which of the chains of amino acids corresponds to the nucleotide sequence aauggcuac?
a. methionine–tryptophan–leucine
b. isoleucine–arginine–leucine
c. valine–glycine–stop
d. asparagine–glycine–tyrosine

The correct answer is d - asparagine - glycine - tyrosine. The genetic code found in DNA is responsible for defining amino acids. It is the triplet of bases in DNA and RNA that define and direct which amino acid is used in the synthesis of a particular protein. The genetic code is expressed in 64 different triplet combinations that code for different amino acids. Of these, three triplets or codons do not code for any amino acid and are thus called non sense codons. The remaining 61 codons are called sense codons.

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