TRANSCRIPTION1. DNA helicase unzips the double stranded helix by breaking the hydrogen bonds between the bases so that either strand can be used as a template for the production of an mRNA molecule2. through complementary base pairing, free RNA nucleotides in the nucleus align alongside the DNA template strand and form hydrogen bonds with the bases3. the new nucleotides are joined together through a condensation reaction by RNA polymerase which forms phosphodiester bonds between the nucleotides4. the molecule of mRNA detaches from the DNA template and exits the nuclear pores to the cytoplasm5. the two strands of DNA can join and wind back up

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