Which of the following specifies a single amino acid in a polypeptide chain?
Athe three-base sequence of mRNA
Bthe complementarity of DNA and RNA
Cthe aminoacyl-tRNA synthetase
Dthe base sequence of the tRNA
Athe three-base sequence of mRNA
Bthe complementarity of DNA and RNA
Cthe aminoacyl-tRNA synthetase
Dthe base sequence of the tRNA