Question

which level of protein structure is formed by the weak bonds between oxygen and hydrogen atoms within the polypeptide backbone?
a) secondary structure
b) quarternary structure
c) primary structure
d) tertiary structure

Explanation:

The secondary structure of a protein is stabilized by hydrogen - bonds between oxygen and hydrogen atoms within the polypeptide backbone. The primary structure is the linear sequence of amino acids, the tertiary structure involves interactions between R - groups and the overall 3 - D shape, and the quaternary structure is about the arrangement of multiple polypeptide subunits.

Answer:

a) Secondary structure