Which Level of Protein Structure Do the α Helix and the β

Question

Which level of protein structure do the α helix and the β pleated sheet represent?
A)primary
B)secondary
C)tertiary
D)quaternary
E)primary, secondary, tertiary, and quaternary

Accepted Answer

The α helix and the β pleated sheet represent the secondary level of protein structure, which describes the folding patterns of localized regions of the polypeptide chain.