Transcription

1. RNA polymerase binds to DNA at a specific region called the promoter site and separates the double helix to single strands.

2. One of the DNA strands on the gene is used as a template on which RNA nucleotides are built, using the base-pairing rules. Note:
   • Adenine (A) on the DNA pairs with Uracil (U) on the RNA:
   • Adenine (A) always pairs with Uracil (U).
   • Guanine (G) always pairs with Cytosine (C).

3. The mRNA (or other types of RNA) transcript is released when it reaches the end of the gene.