Which of the following is true?
A) The peptide bonds in the b-sheet are extended.
B) The peptide bonds in the a-helix coil back on themselves.
C) Both a-helices and b-sheets can be found as part of tertiary structure.
D) All of these

Question

Quizplus · Accepted Answer

A) The peptide bonds in the b-sheet are extended. This is true, as the extended conformation of peptide bonds allows for the structure of a beta sheet.
B) The peptide bonds in the a-helix coil back on themselves. This is also true, as the alpha helix structure is formed by a helical twist of the peptide backbone.
C) Both a-helices and b-sheets can be found as part of tertiary structure. This is true, as both secondary structures (a-helices and b-sheets) can contribute to the complex 3D folding of a protein that makes up its tertiary structure. Therefore, all of these options are correct.

Which of the Following Is True