So unlike DNA which stays within the nucleus of our cell mRNA molecules can actually move from the nucleus to the cytoplasm through the nuclear pores that are found inside the nuclear membrane of the nucleus. Now as we mentioned earlier, there are different types of RNA molecules that exist and each one of these RNA molecules serves its own primary purpose. So let's discuss the different types of RNA molecules and what their primary function is. And let's begin with the messenger RNA or mRNA. So within the nucleus of our cell our DNA can be transcribed. It can undergo a process known as transcription which we'll discuss in detail in the next several lectures.