The form of RNA that carries code from DNA to the site where proteins are assembled is called messenger RNA (mRNA).

Here's a breakdown:

* DNA contains the genetic instructions for building proteins.

* mRNA acts as a messenger, carrying a copy of those instructions from the DNA in the nucleus to the ribosomes in the cytoplasm.

* Ribosomes are the protein-building machinery of the cell. They use the information in the mRNA to assemble amino acids into the correct sequence, creating a protein.