Which occurs during transcription? dna is copied to create a second dna strand. mrna codons and trna anticodons assemble amino acids. dna is unzipped with the aid of dna polymerase. mrna is synthesized from a strand of dna.

During transcription, mRNA is synthesized using DNA as a template. This process usually takes place in the cell nucleus and is carried out with the help of an enzyme called RNA polymerase.

mRNA  plays the role of a messenger hence the term messenger RNA or  mRNA in short. Information for synthesis of a specific protein is transcribed on mRNA in the nucleus of the cell. The mRNA then leaves the nucleus and enters the cytoplasm and attaches onto a  ribosome. Ribosomes are cell structures fondly called the "work bench " of the cell.

It is in the ribosomes that the information brought by mRNA is translated or decoded and used to synthesize the specific protein that was coded for.