DNA Turns Into Polyptide

The process by which DNA turns into polypeptides is a complicated and long. Two main steps in changing the DNA into a polypeptide are transcription and translation, with transcription coming first. The process first starts in the nucleus of the cell. The DNA begins to unfold with the help of a helicase. During the transcription phase of the change, strands of DNA begin to unwind and the complementary mRNA is made or transcribed. The way they do this is by using the common pairs of DNA triplet bases (A-T & C-G) which are transcribed into the mRNA bases (A-U & C-G). The reason the DNA has to be transcribed is because it is too big to pass through the nucleus walls. Once the DNA has been transcribed into mRNA, the mRNA moves to the cytoplasm or