Question

what protein structure is shown below? *
primary
secondary
tertiary
quaternary

Explanation:

The primary structure of a protein is the linear sequence of amino acids. The image shows a linear chain of amino acids (represented by the blue circles), which is characteristic of the primary structure. Secondary structure involves local folding (like alpha - helices or beta - sheets), tertiary is the overall 3D shape of a single polypeptide, and quaternary is the structure when multiple polypeptides come together. Since it's just a linear chain, it's primary.

Answer:

primary