Which of the following is responsible for the alpha-helical structure of proteins?

A) hydrogen bonds
B) ionic interactions
C) polar covalent bonds
D) hydrophobic interactions
E) nonpolar covalent bonds

Alpha-Helical Structure

A common motif in the secondary structure of proteins, characterized by a right-handed coil that provides structural support.

Hydrogen Bonds

Weak bonds formed between a hydrogen atom covalently bonded to one electronegative atom and another electronegative atom, playing a critical role in the structure of water and biological molecules.

Ionic Interactions

Forces of attraction or repulsion between ions or molecules with different charges.