Question

Is pre mRNA the same as hnRNA?

Answer 1

Majority of hnRNAs are pre mRNAs .Newly synthesised mRNAs are often made up of two types of segments ,exons and introns. The exon segments are joined together to produce a mature mRNA that encodes a protein.

So pre mRNA is synthesised from a DNA template in the cell nucleus by transcription.Pre mRNAs comprises the bulk of heterogeneous RNAs(hRNAs).The Pre mRNAs are the first transcript from a protein coding gene. They contain both introns and exons. On removing introns, we get the final mRNAs. So hRNAs and pre mRNAs are the same.