what is genomic dna
Genomic deoxyribonucleic acid is chromosomal DNA, in contrast to extrachromosomal DNAs like plasmids.It is often abbreviated as gDNA. Most organisms contain the same genomic DNA in every cell; however, only certain genes are active in each cell to allow for cell function and differentiation within the body.recursor 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). Additional processing includes the addition of a 5' cap and a poly(A) tail to the pre-mRNA.