Gene transcription. Definition

Medical Definition: Gene transcription

Biosynthesis of an RNA molecule by polymerization of nucleotides complementary to a DNA pattern. This RNA molecule is a precursor mRNA and represents a true copy of the complementary sequence of DNA has been transcribed. A specific sequence located in front of the gene (promoter) acts by identifying the start site of transcription. In RNA, uracil (U) holds the positions of thymidine (T) is in the DNA. It is the working copy of certain segments of DNA.

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