DNA replication, transcription, translation, and protein synthesis?

In the nucleus of a cell, DNA is held. When protein synthesis takes place, the DNA unzips between the nitrogen bases and messenger RNA makes a copy of it and goes out into the cytoplasm and attaches to a ribosome. Then, transfer RNA, which has an amino acid on the top of it and a code on the bottom, pairs with the mRNA that has the base it normally pairs with (C w/ G A w/ U). This lines the amino acids up in the way they're supposed to go for that specific protein. Hope this helps!