What happens during transcription?
During the process of transcription, a portion of a DNA molecule is used to create a mRNA molecule.
This is really important! DNA stores genetic information in the nucleus of your cells. When RNA molecules are produced it happens inside the nucleus. The RNA molecule can then leave the nucleus and travel to ribosomes which are located in the cytoplasm and attached to endoplasmic reticulum. The RNA will be used to create proteins molecules.
See how this happens (transcription discussion starts at 5:22)
Hope this helps!