試題詳解

5. Which of the following statements about the secondary structure of proteins is TRUE.
(A) Proline is a helix breaker
(B) The origin of helix dipoles comes from the hydrogen bonds between the side chains of polypeptides
(C) The parallel β sheets have a better hydrogen bond geometry than the antiparallel β sheets
(D) The a helix contains 10 atoms per turn
(E) The N-terminus of the a helix can be stabilized by lysine residues