- DNA acts as a template providing instructions in the form of a sequence of nucleotides.
- A complimentary section of part of theis sequence is made into mRNA through transcription.
- mRNA acts as a template for complimentary tRNA molecules to attach to and the amino acids they carry are linked to form a polypeptide though translation.
- DNA helicase acts on a specific region on DNA (cistron), to break the hydrogen bonds between the bases, causing the strands to separate.
- RNA polymerase links to the template strand of DNA at the beginning to be copied.
- Transcription occurs when free RNA nucleotides align themselves opposite the template strand.
- RNA polymerase moves along DNA forming bonds that add nucleotides. This results in the synthesis of mRNA alongside the unwinded DNA.
- Behind the RNA polymerase, the DNA strands rejoin to reform the double helix.