Which is a false statement regarding riboswitches?
A. Riboswitches are regions in the 5' untranslated leader of an mRNA.
B. When the effector binds the riboswitch, it may serve to terminate transcription of its target mRNA.
C. When the effector binds the riboswitch, it may serve to continue transcription of its target mRNA.
D. The effector molecules that bind to riboswitches are proteins.
Answer: D
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