St. Thomas, St. John, and St. Croix-the three islands known to many as the U.S. Virgin Islands, and the reason millions of travelers head to the Caribbean every year.
This copying process is called transcription and the copy is mRNA. Transcription takes place in the cytoplasm (prokaryote) or in the nucleus (eukaryote). The transcription is performed by an enzyme called RNA polymerase. To make mRNA, RNA polymerase: 1  Binds to the DNA strand at a specific sequence of the gene called a promoter. 2  Unwinds and unlinks the two strands of DNA. 3  Uses one of the DNA strands as a guide or template.
The synthesis of a strand of mRNA inside the nucleus of a cell is the first step to making a protein. An enzyme called RNA polymerase begins the process of transcription. The DNA unwinds and unzips, exposing a strand to serve as the template for making an mRNA strand. RNA polymerase adds bases to the growing mRNA strand one base at a time.