The diagram shows the transcription of a gene within the nucleus of an animal cell. Which row correctly identifies P, Q and R?
- AP: mRNA; Q: transcribed strand; R: template strand
- BP: primary transcript; Q: transcribed strand; R: template strand
- CP: mRNA; Q: template strand; R: non-transcribed strand
- DP: primary transcript; Q: template strand; R: non-transcribed strand