9.2 Transcription is catalyzed by RNA polymerase ac en of enyme moves one 雷备备备备 Figure 9. RNA polymerase moves Back end continues Frorm and like an inchworm se added to RNA 器器 during elongation when it compresses from the back end and release from the front end 消当Figure 9.6 RNA polymerase moves like an inchworm during elongation, when it compresses from the back end and release from the front end. 9.2 Transcription is catalyzed by RNA polymerase