how is hnrna processed to form mrna?
HnRNA (also known as Pre-mRNA) is a primary transcript formed after transcription of DNA. hnRNA has both introns and exons. ... hnRNA has both introns and exons. To form mature RNA (mRNA) hnRNA go through a process known as splicing to remove unwanted intron from it and also 5' and 3' ends of hnRNA are modified.