Which of the following amino acids would, when incorporated into a polypeptide chain (not at the N or C terminus), make the charge of the polypeptide more positive?

Question

Quizplus · Accepted Answer

Arginine is a positively charged amino acid, so incorporating it into a polypeptide chain would make the overall charge of the polypeptide more positive. All the other choices (alanine, aspartate, serine, and cysteine) are either uncharged or negatively charged amino acids that would not increase the positive charge of a polypeptide.

Which of the Following Amino Acids Would, When Incorporated into a Polypeptide