What Two Important Domains Within a Riboswitch Involve the Ligand-

Question

What two important domains within a riboswitch involve the ligand- binding site?
A)B site and C site
B)alpha and beta
C)conformation and anticonformation
D)A site and B site
E)aptamer and expression platform

Accepted Answer

The two important domains within a riboswitch that involve the ligand-binding site are the aptamer and expression platform. The aptamer is the domain that directly binds to the ligand, while the expression platform influences the conformation of the downstream regulatory elements that control gene expression. Therefore, the best choice is E, aptamer and expression platform.