Question

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

Explanation:

Protein secondary structure involves local folding. Common forms are alpha - helices (like the coiled structure) and beta - sheets (like the zig - zag structure). Primary is the amino acid sequence. Tertiary is overall 3D shape. Quaternary is multiple subunits. Since the image shows alpha - helices and beta - sheets, it's secondary.

Answer:

B. secondary