Which of the Following Is the Best Explanation of Why

question 17

Multiple Choice

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

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