No, DNA polymerase is not used in transcription.
Transcription is the process through which messenger RNA (mRNA) is synthesized from a DNA template. The enzyme responsible for this process is called RNA polymerase, not DNA polymerase. While DNA polymerase is crucial for DNA replication, where it synthesizes DNA strands, RNA polymerase plays the key role in transcription by reading the DNA template and synthesizing a complementary RNA strand.
During transcription, RNA polymerase binds to a specific region on the DNA called the promoter. It then unwinds the DNA helix and uses one of the DNA strands as a template to synthesize the RNA strand. This RNA strand carries the genetic information needed for protein synthesis during translation, which follows transcription.
In summary, the main enzyme involved in transcription is RNA polymerase, while DNA polymerase is specifically involved in DNA replication.