Question

question 30
which type of interaction stabilizes the α helix and the β pleated sheets structures of proteins?
hydrophobic interactions
ionic bonds
hydrogen bonds
peptides bonds
covalent bonds

Explanation:

The secondary - structure elements (α - helix and β - pleated sheets) of proteins are stabilized by hydrogen bonds. Hydrogen bonds form between the carbonyl oxygen of one amino - acid residue and the amide hydrogen of another residue. Hydrophobic interactions mainly contribute to the tertiary structure, ionic bonds can be involved in tertiary and quaternary structures, peptide bonds form the primary structure, and covalent bonds in general refer to stronger bonds like peptide bonds in the primary structure rather than stabilizing secondary structures.

Answer:

C. hydrogen bonds