When Do The fun things happen?

Protein Synthesis occurs In the nucleus. The purpose of this process is to use DNA as a template in order to make mRNA; which is the instructions for making a specific protien.

Was mRNA a typo?

As weird as it sounds, mRNA is one of the three types of RNA. It stands for messenger RNA. The function of this is it carries the coded messages from DNA to the rest of the cell. This is a sequence of nucleotide matters.