Which of the following polypeptides is most likely to form an α-helix explain your answer.(a) CRAGNRKIVLETY (b) SEDNFGAPKSILW (c) QKASVEMAVRNSG

(c) QKASVEMAVRNSG

Explanation:

The alpha helix is a protein arrangement tightly packed, thereby the peptide will form a rod. The option (c) is expected to form an alpha helix because it contains three amino acids charged which are aligned on the face of the helix, 1-two residues positively charged: Lysine (K) and Arginine (R), and 2-one residue negatively charged: Glutamic Acid (E).