Answer:
Proteins have four levels of organization. Primary structure refers to the linear sequence of the amino acids connected by the peptide bonds. The secondary structure consists of local packing of polypeptide chain into α-helices and β-sheets due to hydrogen bonds between peptide bond – central carbon backbone.
Explanation:
Secondary structure is the level of organization in protein structure where are hydrogen bonds within molecules.
The secondary structure is the folding that the polypeptide chain adopts thanks to the formation of hydrogen bonds between the atoms that form the peptide bond.
Hydrogen bonds are established between the -CO- and -NH- groups of the peptide bond (the first as an H acceptor, and the second as an H donor).
In this way, the polypeptide chain is capable of adopting lower free energy conformations, and therefore more stable.
Several types of conformations can be distinguished that determine the secondary structure of a protein :
Therefore, we can conclude that secondary structure is the level of organization in protein structure where are hydrogen bonds within molecules.
Learn more here: https://brainly.com/question/4684763
