Basically an overview of the process of RNA from DNA Templat

Basically an overview of the process of RNA from DNA. Template strand, coding strand, RNA polymerase,promoter, nucleotide, nitrogenouse base, adenine, thymine, poly A tail, 5\' cap, exon, intron, splicing.

I know vaguely everything but what I always forget is poly A tail, 5\'cap, and promoter.

Thanks!