At which level of protein structure are interactions between the side chains (R groups)most important?
A) primary
B) secondary
C) tertiary
D) quaternary
E) all of the above

Question

Quizplus · Accepted Answer

Interactions between the side chains (R groups) are most important at the tertiary level of protein structure, where the complex 3D folds are determined by the interactions between the side chains. In the primary and secondary structure, the interactions are mainly between the backbone atoms, while in the quaternary structure, the interactions are between multiple polypeptide chains. Therefore, option C (tertiary) is the correct choice.

At Which Level of Protein Structure Are Interactions Between the Side