(a) According to the genetic code in Table 24.1, which amino acid is selected by the mRNA codon GAA?
(b) What is the sequence in the original DNA that led to this codon being present in the mRNA?
(c) If a mutation occurs in the DNA in which a G is substituted for the nucleotide at the second position of this coding region in the DNA, which amino acid will now be selected?

Data given in Table 24.1

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TABLE 24.1 Examples of the 64 Codons in the Genetic Code Codon Base Sequence* AAA AAC AUG CAA CAU GAA GCA UAA UAC Amino Acid to Be Added Lysine Asparagine Start Glutamine. Histidine Glutamic acid Alanine Stop Tyrosine *A Adenine, C = cytosine, guanine, Uuracil. G