Podcast
Questions and Answers
Which of the following statements about bacterial sRNAs is true?
Which of the following statements about bacterial sRNAs is true?
- Most base-pairing sRNAs in bacteria are encoded in cis with limited complementarity.
- Trans-encoded sRNAs can regulate ribosome binding or mRNA degradation. (correct)
- Bacterial sRNAs only enhance translation by disrupting secondary mRNA structure.
- All bacterial sRNAs are derived from the 5' UTRs of mRNAs.
How do some bacterial sRNAs affect translation?
How do some bacterial sRNAs affect translation?
- By disrupting secondary mRNA structure that impedes ribosome binding. (correct)
- By recruiting ribosomes to the mRNA and enhancing translation.
- By binding to the 3' UTR of the mRNA and promoting ribosome binding.
- By binding close to the Shine-Dalgarno motif and preventing ribosome binding.
What is the function of the RyhB sRNA in E. coli?
What is the function of the RyhB sRNA in E. coli?
- It recruits ribonucleases to degrade mRNAs encoding non-essential products.
- It promotes ribosome binding to mRNAs encoding iron-binding proteins.
- It regulates translation of different targets in response to iron levels. (correct)
- It binds to the 3' UTRs of mRNAs encoding iron-binding proteins.
What happens to the translation of non-essential products in E. coli when iron levels are high?
What happens to the translation of non-essential products in E. coli when iron levels are high?
How do bacterial sRNAs affect mRNA degradation?
How do bacterial sRNAs affect mRNA degradation?
When are trans-encoded sRNAs in bacteria often produced?
When are trans-encoded sRNAs in bacteria often produced?
What is the main function of regulatory RNAs?
What is the main function of regulatory RNAs?
Which of the following is NOT a principle that holds true for many regulatory RNA molecules?
Which of the following is NOT a principle that holds true for many regulatory RNA molecules?
How can regulatory RNAs act as regulators by base-pairing?
How can regulatory RNAs act as regulators by base-pairing?
How can regulatory RNAs be encoded with respect to their target on the DNA strand?
How can regulatory RNAs be encoded with respect to their target on the DNA strand?
What is the flexibility of RNA structure that allows it to bind to molecules other than RNA/DNA?
What is the flexibility of RNA structure that allows it to bind to molecules other than RNA/DNA?
How are bacterial regulatory RNAs typically synthesized?
How are bacterial regulatory RNAs typically synthesized?
