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Watson and Crick proposed that RNA must copy the DNA message in the nucleus and carry it out to the cytoplasm, where proteins are synthesized. Crick also predicted the existence of an adaptor molecule that reads the genetic code and selects the appropriate amino acids to add to a growing polypeptide chain.This proposed flow of genetic information from DNA to RNA to protein became known as the Central Dogma..As it turned out, several types of RNA are involved in the utilization of genetic information. In the nucleus, the DNA code is transcribed, or copied, into a messenger RNA (mRNA) molecule.atson and Crick proposed that RNA must copy the DNA message in the nucleus and carry it out to the cytoplasm, where proteins are synthesized. Crick also predicted the existence of an adaptor molecule that reads the genetic code and selects the appropriate amino acids to add to a growing polypeptide chain.
This RNA is known as messenger RNA. slide 1 of 4. DNA to RNA to Protein The genetic code is written in the language of DNA, the four chemical bases - A, C, G and T. However, when it is time to make a protein, the DNA code is converted into RNA before it is translated into protein. This article is an in depth look at the first stage in this process, how RNA is formed from DNA.