Answer: Transcription
Explanation: Transcription is the process of converting the genetic message in a DNA molecule into an RNA in a reaction catalyzed by the enzyme RNA polymerase. This is the first step in protein synthesis and takes place in the nucleus. The double stranded DNA is unwound and copied into an RNA molecule. This process is followed by translation in which the RNA produced leaves the cell and enters the ribosome where the nucleotide sequence of the mRNA molecule is converted into an amino acid sequence of a protein.