Wednesday, 31 December 2008

Transcription

This is the process that produces a molecule of mRNA from DNA.

  1. The DNA helix unwinds as the hydrogen bonds between the base pairs break.
  2. Free DNA nucleotides in the nucleus, pair with the exposed DNA bases on the sense strand.
  3. These are held together using the enzyme DNA polymerase
  4. This new strand of DNA nucleotides (mRNA) then separates from the sense strand and leaves the nucleus.

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