What occurs during transcription?

Transcription is the process which makes mRNA in the nucleus. Firstly, the gene uncoils and hydrogen bonds are broken, causing the two strands to separate. One of these strands is the template. RNA nucleotides line up and pair with their complementary bases on the DNA strand. They are added by an enzyme called RNA polymerase. The final product, mRNA, exits through a nuclear pore into the cytoplasm where it joins to a ribosome ready for protein synthesis.