Final answer:
Ionic bonding, hydrogen bonding, and disulfide linkages are the most important forces in stabilizing protein structures.
Step-by-step explanation:
The most important forces in stabilizing protein structures are ionic bonding, hydrogen bonding, and disulfide linkages.
Ionic bonding occurs when positively and negatively charged side chains of amino acids attract each other.
Hydrogen bonding forms between electronegative atoms and hydrogen atoms, and is crucial for the intra- and intermolecular interactions of proteins.
Disulfide linkages result from the oxidation and linkage of sulfur atoms in cysteine amino acid units, providing strong stabilization to the tertiary structure of proteins.