What information do you need to have go show how transcription works?

To explain how transcription works, you would need to understand that it is the process by which information from a gene is transcribed into messenger RNA (mRNA) by RNA polymerase. The key components involved include the gene with DNA sequences that encode the information, RNA polymerase which binds to the gene and transcribes it, and nucleotides that are assembled into an mRNA molecule using the gene as a template.