In a Ramachandran Diagram,a Larger Area Represents Sterically Allowed Torsion $\phi$

Multiple Choice

In a Ramachandran diagram,a larger area represents sterically allowed torsion angles of $\phi$ and $\varPsi$ that are allowed in _____ rather than in ______ because there is greater opportunity for separation of amino acid side chains.

A) secondary structure…tertiary structure
B) α helix…β sheet
C) β sheet…α helix
D) tertiary structure…secondary structure
E) none of the above