When is mRNA used?

The mRNA is used to make new protein by your cells. This process is called translation and happens in the cytoplasm. One mRNA is specific for one protein.

Messenger RNA, also known as mRNA, is made in the nucleus of a cell, and then exported to the cytoplasm where the translation machinery which makes proteins, binds to these mRNA molecules and reads the code on the mRNA to make a specific protein.