Answer: Transcription
Step-by-step explanation:
The Transcription unit generally contains 3 regions
1. A promoter
2. Structural genes
3. Terminator
Since the strands have opposite polarity the DNA dependent RNA polymerase also catalyze this in one direction that 5 - 3 then the strands that has the polarity 3' - 5' act as a template and is referred as template strand. The other strand that has polarity 5' - 3' is displaced during transcription.