Transcription

• 1. The two strands of the DNA helix are unzipped by breaking of the weak Hydrogen bonds between base pairs.
• 2. The enzyme RNA polymerase attaches to the DNA in a non-coding region just before the gene.
• 3. RNA polymerase moves along the DNA strand. Free RNA nucleotides form hydrogen bonds with the exposed DNA strand nucleotides by complementary base pairing to form a strand of mRNA
• 4. The newly formed strand of mRNA is now ready to leave the nucleus and travel to the ribosome
• Transcription

  A) Nucleus

  B) mRNA

  C) Mature transcript

  D) Cytoplasm

  E) Nuclear membrane