Genetics Is Taunting Me

RNA polymerase is an enzyme that's responsible for transcribing DNA into RNA. It facilitates producing proteins according to the DNA template. Like many complex enzymes it's made of several subunits. The sigma (σ) subunit is responsible for initiating transcription. The rho (ρ) factor is responsible for terminating transcription.

I believe I've mentioned my chronic inability to tell the difference between the two? Just when I reliably learned to tell mu from eta, too.