∞ generated and posted on 2016.02.06 ∞
Templated polymerization of RNA.
RNA during transcription is synthesized by a enzyme called RNA polymerase. In cellular organisms, these RNA polymerases specifically are DNA-dependent RNA polymerases. They copy, that is, transcribe a sequence of DNA (sequence of bases) into a sequence of RNA information (also a sequence of bases).
The RNA so transcribed is not an exact duplicate of the DNA strand that is being copied but instead is its complement. That is, in the course of transcription A begets U, T begets A, G begets C, and C begets G. Transcription thus is polymerization of an RNA strand, one that is complementary to a DNA template.
See also transcription initiation and elongation (molecular genetics).
Transcription serves as the basis of synthesis of the RNA molecules that will become tRNAs (transfer RNAs) and rRNAs (ribosomal RNAs). It also serves as the basis of production of mRNA, which in turn serve as the templates for the polymerization of proteins.
The following video walks you step-by-step through the transcription process including initiation, elongation, and termination:
The following video walks through a proposed treatment of by blocking production of protein; not very detailed description or depiction of antisense technology but pretty pictures nonetheless: