A riboswitch is
Show Hint
- a RNA molecule acting as an enzyme.
- a structured regulatory mRNA segment that binds a small molecule.
- a non-coding RNA that regulates gene expression.
- a RNA molecule that can change its function under new environment
The Correct Option is B
Solution and Explanation
Step 1: Concept
Gene regulation can occur at the mRNA level through structural changes induced by metabolites.
Step 2: Meaning
A riboswitch is a regulatory segment of an mRNA molecule that binds a specific small molecule (ligand).
Step 3: Analysis
Upon binding the ligand, the riboswitch changes its folding pattern, which directly affects the translation or transcription of that specific mRNA.
Step 4: Conclusion
It is a structured part of the mRNA itself that acts as a sensor. Final Answer: (B)
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