Which of the Following Statements About Riboswitches is True

Question

Which of the following statements about riboswitches is true?
A) They are found mainly at the 3' end of a mRNA.
B) They are capable of binding to a ligand and activating transcription but do not repress transcription.
C) They can control transcription but no translation.
D) Ligands that can bind range from vitamins, amino acids, magnesium, and fluoride.
E) They have no secondary structures involved in their control.

Accepted Answer

Riboswitches are RNA molecules that can bind to a specific small molecule or ion and alter their secondary structure to control gene expression. They are found in the non-coding regions of mRNA and can control both transcription and translation. Ligands that can bind to riboswitches include vitamins, amino acids, magnesium, and fluoride.