... a ladder. The role of DNA in Cell Division DNA is found in the cell nucleus, which has a Nuclear Envelope Pore. The role of DNA is to provide instructions for proteins to be produced in the cytoplasm. However, DNA can't pass through the Nuclear Envelope Pore of the nucleus to the cytoplasm. Therefore the DNA has to pass accurate instructions from the nucleus to the cytoplasm. This is done by DNA replication where the DNA helix unfolds and free nucleotides (RNA) align alongside the DNA with the same organic base (A, C, T & G), and joins together to form the mRNA. This part of the process is called transcription. (Note, a U base replaces a 'T' base on the mRNA). Unlike DNA the mRNA containing the same genetic information as the DNA can pass through the Nuclear Envelope Pores into the cytoplasm where proteins are produced. This information is going to ...

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