Answer:
secondary structure of a protein results from hydrogen bond.
Tertiary structure is not directly dependent on peptide bond.
Explanation:
Hydrogen bond are very essential in determining the 3-dimensional structure of folded protein.
The peptide bond is like a covalent bond found between the carboxyl group of a molecule and amino group of the other molecule when reacting together.
Note that, tertiary structure of the protein is regarded as the native conformation of protein, meaning the most stable structure under any given physiologic condition. And this is possible by the following.
* Van der waal forces
* Hydrophobic interaction
* Hydrogen bond
* Electrostatic bond.
