A: RNA polymerase I
B: RNA polymerase II
C: RNA polymerase III
D: RNA holoenzyme
E: RNA core enzyme
举一反三
- Which of the following RNA polymerase is responsible for the transcription of protein-coding genes in eukaryotes? A: RNA polymerase I B: RNA polymerase II C: RNA polymerase III D: RNA polymerase IV
- Using the DNA template in a process called _______ RNA is synthesized utilizing which enzyme? A: translation, RNA polymerase B: transcription, DNA polymerase C: transcription, RNA polymerase D: replication, DNA polymerase
- In eukaryotes, the product of RNA polymerase II is: A: mRNA B: 18SrRNA C: RNA D: tRNA
- In<br/>eukaryotes, the product of RNA polymerase II<br/>is:() A: mRNA B: 18SrRNA C: 28SrRNA D: tRNA E: RNA
- Which of the following descriptions about DNA and RNA polymerase are correct: A: RNA polymerase synthesize RNA chain using nucleoside diphosphate instead of nucleoside triphosphates. B: RNA polymerase can initiate transcription without a primer, and nucleotides are added to 5’ end of the growing RNA chain. C: RNA polymerase can add nucleotides in both 3’ or 5’ end of RNA chain. D: Both RNA polymerase and DNA polymerase can only add nucleotides to 3’ end of the polynucleotides.
内容
- 0
RNA polymerase is an enzyme that is responsible for copying a DNA sequence into an RNA sequence, during the process of transcription.（）
- 1
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
- 2
The polymerase which is used in DNA replication is ( ) A: DNA-dependent RNA polymerase B: DNA-dependent DNA polymerase C: RNA-dependent RNA polymerase D: RNA-dependent DNA polymerase E: none of above
- 3
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.
- 4
The enzyme used in the polymerase chain reaction is ( ) A: restriction endonuclease B: reverse transcriptase C: DNA polymerase D: RNA polymerase