Here's why:
* DNA contains the genetic code: DNA holds the blueprint for building proteins.
* Transcription copies the code: During transcription, a special enzyme called RNA polymerase reads a gene's DNA sequence and creates a complementary copy called messenger RNA (mRNA).
* mRNA carries the instructions: The mRNA molecule then travels out of the nucleus to the ribosomes, where protein synthesis takes place.
So, transcription is the crucial first step in translating the DNA code into a protein.