Which of the Following Pairs of Amino Acids Contains Both

Question

Which of the following pairs of amino acids contains both an aliphatic and an aromatic amino acid?
A)Thr and Tyr
B)Val and Gln
C)Phe and Ile
D)Ser and Cys
E)none of the above

Accepted Answer

Phe (Phenylalanine) is an aromatic amino acid due to its benzyl side chain, while Ile (Isoleucine) is an aliphatic amino acid, characterized by its non-aromatic, hydrocarbon side chain.