CHM 360

Explanation – Utilize the one-letter codes for all amino acids and know their charge and polarity. Globular proteins are usually seen in aqueous environments and will fold to have nonpolar amino acids on its interior. Based on that information, the polypeptide needs to have outside amino acids that are charged or polar, while the interior will have nonpolar/hydrophobic amino acids. D is correct because (RDGLIVFYWSC) arginine, aspartame, serine, and cysteine are polar/charged.