Which of the Following Levels of a Protein Are Susceptible

Which of the following levels of a protein are susceptible to denaturation?

A) primary and secondary structures
B) secondary and tertiary structures
C) tertiary and quaternary structures
D) primary and tertiary structures
E) primary and quaternary structures Denaturation by such things as pH and temperature cause the bonds which allow for tertiary and quaternary structures to be disrupted. When their folding is altered, the function of the protein is disrupted.