Which of the following statement about RNA polymerase in prokaryotes is correct:
A: Holoenzyme is composed of five subunits (ααββ′σ)
B: Any subunit of holoenzyme cannot bind to DNA separately in vivo
C: Core enzyme consists of five subunits(ααββ′ω)
D: σ factor helps RNA polymerase to recognize promoter
A: Holoenzyme is composed of five subunits (ααββ′σ)
B: Any subunit of holoenzyme cannot bind to DNA separately in vivo
C: Core enzyme consists of five subunits(ααββ′ω)
D: σ factor helps RNA polymerase to recognize promoter
举一反三
- Which of the<br/>following statement about RNA polymerase in prokaryotes is<br/>correct:() A: Holoenzyme is composed of five subunits (ααββ′σ) B: Any subunit of<br/>holoenzyme cannot bind to DNA separately in vivo. C: Core enzyme<br/>consists of five subunits(ααββ′ω) D: σ factor can<br/>catalyze the synthesis of RNA E: σ factor<br/>helps RNA polymerase to recognize promoter
- In eukaryotes, the RNA polymerase responsible for mRNA transcription is A: RNA polymerase I B: RNA polymerase II C: RNA polymerase III D: RNA holoenzyme E: RNA core enzyme
- Which of the following statement about RNA polymerase 1 is correct ( ) A: Composed of 8~16 subunits B: The transcription product is rRNA C: Located in the nucleolus D: Sensitive to α-Amanita
- Which of the following statements about the σ subunit of RNA polymerase is wrong? () A: It enables the enzyme to transcribe asymmetrically. B: It confers on the core enzyme the ability to initiate transcription at promoters. C: It decreases the affinity of RNA polymerase for regions of DNA that lack promoter sequences. D: It facilitates the termination of transcription by recognizing hairpins in the transcript.
- Each RNA polymerase contains subunits with homology to subunits of the E. coli RNA polymerase as well as additional subunits， which are unique to each polymerase.