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 is not the difference between DNA polymerase and RNA polymerase? A: The fidelity of the two enzymes is different when the template chain is copied B: The number of reaction starting sites is different C: Different reading directions of template chain D: Size of reaction products E: The reaction process is bidirectional

The most widely used polymerase in the PCR process is ( ). A: klenow fragment B: T4DNA polymerase C: Taq DNA polymerase D: Vent DNA polymerase

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.

In<br/>E.coli, the RNA primer at the beginning of each Okazaki fragment is is removed by 。 A: DNA polymerase B: DNA polymerase I C: DNA polymerase II D: DNA polymerase