Most Riboswitches Control

Question

Most riboswitches control
A) transcription.
B) translation.
C) ribosome synthesis.
D) tRNA synthesis.

Accepted Answer

Riboswitches are regulatory sequences that control gene expression at the level of translation. They are located in the 5' untranslated region (UTR) of mRNAs and bind to specific ligands, which can be metabolites, ions, or small molecules. When a riboswitch binds to its ligand, it undergoes a conformational change that either blocks or promotes the binding of the ribosome to the mRNA, thereby regulating translation.