Multiple Choice
What is the consensus sequence for the Pribnow box in prokaryotic gene regulation?
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16. Regulation of Expression
Prokaryotic Gene Regulation via Operons
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Which is a correct statement about rho-independent termination in prokaryotic gene regulation?
A
It requires the rho protein to terminate transcription.
B
It involves the formation of a hairpin loop followed by a series of uracil residues.
C
It involves the cleavage of mRNA by endonucleases.
D
It occurs only in eukaryotic cells.
Verified step by step guidance1
Understand that rho-independent termination is a mechanism of transcription termination in prokaryotes, not eukaryotes.
Recognize that rho-independent termination does not require the rho protein; instead, it relies on specific sequences in the mRNA.
Identify that the key feature of rho-independent termination is the formation of a hairpin loop structure in the mRNA, which is followed by a series of uracil (U) residues.
The hairpin loop causes the RNA polymerase to pause, and the weak A-U base pairing in the RNA-DNA hybrid region facilitates the release of the mRNA transcript.
Conclude that the correct statement about rho-independent termination is that it involves the formation of a hairpin loop followed by a series of uracil residues.
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