Prokaryotic transcription could terminate by
A) association of a Factor with the DNA.
B) RNA with GC stem loop structures.
C) a G-rich region on the DNA.
D) RNA polymerase without the elongation factor.

Question

Prokaryotic transcription could terminate by
A) association of a Factor with the DNA. 
B) RNA with GC stem loop structures. 
C) a G-rich region on the DNA. 
D) RNA polymerase without the elongation factor.

Quizplus · Accepted Answer

Prokaryotic transcription can terminate through the formation of GC-rich stem loop structures in the RNA. This causes RNA polymerase to pause, and the RNA transcript to be released from the DNA template. Termination factors are not involved in this process, so choice A is incorrect. G-rich regions on the DNA may be involved in termination for some genes, but this is not a general mechanism and is not the best choice for this question. RNA polymerase without the elongation factor could lead to premature termination, but this is not a common mechanism of transcription termination and is not the best choice for this question.

Prokaryotic Transcription Could Terminate by