Amino acids link together end-to-end forming the structure of proteins. chemical properties of amino acid groups within a sequence interact with one another in protein structure resulting in hydrogen bonding and chain folding.

The answer to this question would be: primary structure; secondary structure

Protein is the macromolecule with a complex and unique shape that it was used by white blood cells to determine whether a cell is a foreign cell. Protein can have up to a quarternary structure that will make its 3D structure complex. The primary structure identical with the peptide bond, secondary with the hydrogen bond. 

Long term continuous groundwater monitoring, especially with warning systems and anthropic activity monitors