This process is called elongation. Three of the four nitrogenous bases that make up RNA — adenine (A), cytosine (C), and guanine (G) — are also found in DNA. In RNA, however, a base called ...

DNA is always synthesized in the 5'-to-3' direction ... initiation requires a primer, elongation is always in the 5'-to-3' direction, and replication is always continuous along the leading ...

The process of transcription elongation by RNA polymerase II (Pol II), in which Pol II travels along DNA and synthesizes RNA from DNA, is essential for proper gene expression in all eukaryotic cells.