1. Transcription: RNA polymerase uses a DNA template to synthesize a complementary RNA molecule. This RNA molecule can then be used to direct protein synthesis (mRNA) or perform other functions within the cell (tRNA, rRNA).

It's important to note that while RNA polymerase has a single primary job, it does so in a complex and multi-step process involving:

* Binding to DNA: RNA polymerase recognizes and binds to specific DNA sequences called promoters.

* Unwinding DNA: The enzyme unwinds the DNA double helix to expose the template strand.

* Synthesizing RNA: RNA polymerase reads the template strand and adds complementary RNA nucleotides one by one to build a new RNA molecule.

* Terminating transcription: RNA polymerase recognizes specific sequences in the DNA that signal the end of transcription.

So, while RNA polymerase doesn't have two distinct jobs, it performs a complex and crucial process of transcribing DNA into RNA, which is essential for all life.