Which of the following statements is true about $\alpha$-helices?
A) The center of the helix is an open channel.
B) There are about seven amino acids per helical turn.
C) The amide backbone dipoles line up in one direction.
D) The helical backbone structure is stabilized by ionic interactions.

Question

Quizplus · Accepted Answer

F1F1F1S1F1F1F10-helices have a characteristic amide backbone dipole orientation, with the dipoles all lining up in the same direction. This contributes to the helix's stability as it forms favorable dipole-dipole interactions. However, the other statements are not true about this type of helix. The center of the helix is not open, there are about 3.6 amino acids per helical turn (not 7), and the helical backbone structure is not stabilized by ionic interactions.

Which of the Following Statements Is True About α\alphaα -Helices? A) the Center of the Helix Is an Open

Which of the Following Statements Is True About $\alpha$ -Helices?
A) the Center of the Helix Is an Open