<prompt> Which one of the following is not true for an α-helixIt is one of the most important secondary structureIt has a net dipole momentAll hydrogen bonds are aligned in the same directionLong stretches of left handed α-helices occur in proteins  <response>: Right-handed clockwise α-helix is more stable and therefore is the usual α-helix pattern found in the natural secondary structure. Left-handed α-helix is not common.α-helix is the most common secondary structure in proteins.α-helix has an overall dipole moment: amino terminus of an alpha helix is positive and carboxy terminus is negative.All hydrogen bonds in a-helix are parallel i.e. in the same direction. 