Question

What are two types of secondary protein structure?

Short answer

The hydrogen bond is the primary bond that holds the protein's secondary structure together.. A hydrogen bond is formed between atoms in the same polypeptide or between polypeptide chains in the secondary structure of protein. The two most common secondary structures are as follows: $\alpha$-helix and$\beta$-plated sheet.

Step-by-step solution

Step 1:Introduction

Protein secondary structure is a local interaction between polypeptide chain stretches that includes -helix sheet structures with and without pleats

Step 2:Amino acids 

Amino acids contain an amine $\left(-{\mathrm{NH}}_2\right)$and carboxylic acid $(-\mathrm{COOH})$functional group. Both functional groups are covalently bonded to the a-carbon. All proteins are constructed from amino acids. A dipeptide is formed when two amino acids undergo a reaction that results in the formation of an amide bond between one amino acid's amine group and the carboxylic group of the other amino acid that connects the two amino acids Proteins are macromolecules made up of repeating subunits known as amino acids, which determine the shape and function of the protein.

Step 3:The hydrogen bond 

The hydrogen bond is the primary bond that stabilizes the secondary structure of protein. A hydrogen bond is formed between atoms in the same polypeptide or between polypeptide chains in the secondary structure of protein. The two most common secondary structures are as follows: $\alpha$-helix and $\beta$-plated sheet.