Define transcription phase of gene expression process, Biology

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Define Transcription Phase of Gene Expression Process?

Transcription is the enzyme synthesis of RNA on a DNA template. This is the first stage in the overall process of gene expression and eventually leads to the synthesis of a protein encoded by the respective gene; it is catalyzed by an WA polymerase. RNA polymerase binds to a specific DNA sequence called promoter to initiate RNA synthesis. These sequences are upstream end of the region that codes for protein and they contain short conserved DNA sequences, which are common to different promoters. The binding of RNA polymerase to the promoter sequence results in local DNA unwinding. Very few RNAs are transcribed directly into the final mature RNA product. Most newly transcribed molecules undergo various alterations to yield the mature product. RNA processing is used to describe these alterations to the primary transcript.


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