What is the function of this cap? Well, basically one important function of this cap is to protect our mRNA from the degradation that could take place during the process of translation, during the process of protein synthesis. And not only that, this addition of the five cap also basically gives our mRNA the ability to leave our nucleus through the nuclear pores and enter the cytoplasm of our cell. So it also stabilizes the mRNA molecule and AIDS in transport across the nuclear membrane of the nucleus of the cell. Now let's move on to the second type of process, second type of post transcriptional modification that takes place in the nucleus known as the poly and ventilation of the three and tail. So before the nucleus or before the pre mRNA actually leaves our nucleus, our tail has to actually be removed.