Which of the following is the best explanation of why the α-helix and the β-pleated sheet are the most stable protein conformations possible?
A)Both structures reflect a maximum amount of hydrogen bonding
B)Their local conformations have amide bonds that can break and reform
C)All of the amino acids polymerize, primarily those that are large and/or polar, to form an α-helix
D)The secondary structure is strengthened by disulfide linkages
E)The electrons in the nitrogen atoms in these structures exist in excited states

Question

Quizplus · Accepted Answer

The α-helix and the β-pleated sheet are the most stable protein conformations possible because they reflect a maximum amount of hydrogen bonding, which contributes to the stability of the structure. The hydrogen bonds form between carbonyl and amide groups in the polypeptide backbone, stabilizing the conformation.

Which of the Following Is the Best Explanation of Why