Which of the following is the necessary and sufficient condition(充要条件) of the effective initiation of bacterial transcription:()
A. Helicase
B. Primase
C. The holoenzyme of RNA polymerase
D. The core enzyme of RNA polymerase
E. RNA polymeraseⅡ
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The signal of transcription termination prokaryotic cell is:()
A. Termination codon
B. Terminator
C. The end of DNA chain
D. The inactivation of RNA polymerase
Which of the following factor is related to transcription termination in prokaryotic cell:()
A. σ
B. α
C. β
D. ρ
E. γ
The ternary complex in the elongation step of transcription consists of:()
A. Complex ofσfactor, core enzyme and DNA strand which are formed in the promoter region.
B. Complex of core enzyme, DNA strand and nascent RNA chain
Complex of three holoenzymes formed in transcription start site
D. Complex ofσfactor, core enzyme and helicase
Which of the following statement about Rho-independent transcription termination is NOT correct?()
A. The terminator intensively contains A-T pair and G-C pair
B. 5’ end of transcription product is rich of
C. The transcription product could form stem-loop structure
D. The stem-loop structure could stop the transcription of RNA polymerase.
E. The A-U pairs downstream stem-loop structure make the unstable hybridized strand become even more unstable.
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