The alpha helices and beta sheets are the example of which level of protein organization

Options

A. Primary structure
B. Secondary structure
C. Tertiary structure
D. Quaternary structure

Answer

B

Explanation

In secondary structure a polypeptide chain is often coiled into a regular spiral called alpha helix. The amino acid is so placed that their side chain extends outward
from the spiral. Two or more polypeptide chain may join together by an intermolecular hydrogen bond and may bend into parallel folds to form β − pleated sheet.