And what that means is this eukaryotic cell will use the premrina molecule and because it is a eukaryotic cell, it has the proper machinery to remove these intros and basically combine these exons. So we basically take the premna, we remove these orange sections, we modify the mRNA in other ways. For example, we add a polyatail and then we finalize and we form that fully processed mRNA molecule that only consists of these exon sections and not of these intron sections. Now, once we form the fully processed mRNA molecule that no longer contains those intron sections, we now take and mix it with a special enzyme known as reverse transcriptase. Now, what reverse transcriptase does is it uses the mRNA molecule to form the DNA molecule. And so we take this mRNA, mix it with reverse transcriptase and we form a DNA molecule that is complementary to that mRNA molecule that has been fully processed and which no longer contains those introns.