* Transcription is a process, not a property of the DNA molecule. The process of transcription involves the copying of a DNA sequence into a messenger RNA (mRNA) molecule. Any DNA sequence can potentially be transcribed, depending on the needs of the cell.
* Genes are the functional units of DNA. Within a DNA molecule, specific regions called genes contain the instructions for building proteins. These genes are the sequences that are typically transcribed.
So, instead of referring to a "transcribed DNA molecule", we typically talk about:
* The gene being transcribed. For example, the gene for insulin is transcribed to produce insulin mRNA.
* The specific DNA sequence being transcribed. We might say "this particular region of DNA is being transcribed."
Let me know if you have any other questions!
