A riboswitch is a domain within certain mRNAs that has all of the following characteristics, except:
A) Riboswitches act as switchable "on-off" elements that selectively bind metabolites and control gene expression.
B) All riboswitches are ribozymes.
C) Riboswitches have two structural domains: an aptamer and an expression platform.
D) Riboswitches have the potential to form alternative anti-terminator and terminator hairpins.
Correct Answer:
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