RNA polymerase complexes

RNA polymerase complexes are molecular machines responsible for creating RNA molecules from DNA templates. They bind to specific DNA regions and unwind the DNA strands to access the genetic code. Using one strand of DNA as a guide, the enzyme assembles a complementary RNA strand by linking nucleotides, the building blocks of RNA. This process, called transcription, is essential for gene expression. The RNA polymerase complex is highly regulated, ensuring that genes are transcribed accurately and at the right times to support cellular functions.