Here's a breakdown:
* DNA contains the genetic instructions for building proteins.
* Transcription is the process where a section of DNA is copied into a messenger RNA (mRNA) molecule.
* mRNA then carries the genetic code from the DNA in the nucleus to the ribosomes in the cytoplasm, where protein synthesis takes place.
Think of it like this: DNA is the blueprint, transcription is the copying process, and mRNA is the copy that goes to the construction site (ribosome) to build the protein.