Answer:a). The first has fewer amino acids than the second.
Explanation: The amino acid sequence of the protein created from the first mRNA sequence is Methionine-isoleucine-valine while the amino acid sequence of the protein created from the second mRNA sequence is Methionine-isoleucine-valine-tyrosine.
From the information provided, AUG codes for methionine, AUA codes for isoleucine, GUG codes for valine UAG codes for 'stop', and UAC codes for tyrosine. Therefore, the first protein has fewer amino acids than the second protein.