1) RNA polymerase attches to the DNA double helix at the beginning of the gene
2) The hydrogen bonds between the two DNA strands in the gene break up, seperating the two strands
3) One of the strands is then used as a template to make mRNA
4) The RNA polymerase lines up with free RNA nucleotides along side the template strand- specific base pairing means that the mRNA molecule will end up being complementary copy of the DNA (except T is replaced with U)
5) Once the RNA nucleodies have paired up with their specific bases on the DNA strand they're joined toether forming a mRNA molecule
6) The hydrogen bonds between the uncoiled strands of the DNA reform once the RNA polymerase has passed by and the strands coil back into a double helix
7) When RNA polymerase reaches a stop signal it stops making mRNA and detaches from the DNA
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