Genomic DNA

Genomic deoxyribonucleic acid (abbreviated as gDNA[1]) is chromosomal DNA, in contrast to extra-chromosomal DNAs like plasmids.

[2] gDNA predominantly resides in the cell nucleus packed into dense chromosome structures.

When a cell is not dividing, chromosomes exist as loosely packed chromatin mesh.

Precursor mRNA (pre-mRNA) is transcribed by RNA polymerase II in the nucleus.

pre-mRNA is then processed by splicing to remove introns, leaving the exons in the mature messenger RNA (mRNA).