Biochemistry Which one of the following is not true for an a-helix: A It is one of the most impoant secondary structure B It has a net dipole moment C All hydrogen bonds are aligned in the same direction D Long stretches of left handed a-helices occur in proteins 💡 Explanation Which one of the following is not true for an a-helix: ✓ Correct Answer: D. Long stretches of left handed a-helices occur in proteins