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) primary, secondary, tertiary, and quaternary

Question

Quizplus · Accepted Answer

Interactions between the side chains (R-groups) are most important in determining the overall 3D shape and stability of a protein, which occurs at the tertiary level of protein structure. Primary structure refers to the linear sequence of amino acids, secondary structure refers to local folding patterns such as alpha helices and beta sheets, and quaternary structure refers to the interaction between multiple protein subunits. Therefore, the best choice is C, tertiary.

At Which Level of Protein Structure Are Interactions Between the Side