Transcription involves unzipping DNA, using the antisense strand as a template for RNA polymerase to synthesize an mRNA strand by forming phosphodiester bonds between free RNA nucleotides.
Transcription involves unzipping DNA, using the antisense strand as a template for RNA polymerase to synthesize an mRNA strand by forming phosphodiester bonds between free RNA nucleotides.
| Front | Transcription 2.1.3(g) |
|---|---|
| Back | - section of DNA with specified gene unzips via DNA helicase - 2 strands free, one is sense strand (form 5`3 and codes for protein) and other is antisense strand (from 3`5 and doesn't code for protein and so acts as template), this means RNA bases identical to sense strand bases - free RNA nucleotides pair with antisense (U no T) - phosphodiester bonds formed by RNA polymerase along free RNA - Transcription stops at end of gene, forming mRNA strand - mRNA strand detaches from template and leaves through nuclear pore, and DNA zips back up |
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