【文章內(nèi)容簡介】
_ B = _________________ C = _________________ D = _________________ E = _________________ III Select the right answer (20 points, 2 pts per question。 Select the best answer for each question.)1. The bond between a phosphate group and the ribose sugar groups in RNA is called which of the following? ( )(A) Phosphodiester bond (B) Glycosidic bond (C) Peptide bond (D) Amide bond 2. Which enzyme does not play a role in DNA replication? ( )(A) DNA polymerase (B) Helicase (C) Singlestranded binding protein (D) Guanyl transferase 3. Splicing is the process that does which of the following? ( )(A) Remove introns and conserve exons (B) Remove exons and conserve introns (C) Remove mutated regions of primary transcript RNA (D) Add multiple adenosine bases to the end of a primary RNA transcript 4. The ideal spacing between the 10 and 35 regions of a prokaryotic promoter is: (