Question

Which part of a transcription unit serves as the start site for transcription?

Options

• Structural gene

• Enhancer

• Terminator

• Promoter

Answer 1

The promoter is the part of a transcription unit that serves as the start site where RNA polymerase binds to initiate transcription. It is located upstream of the structural gene and contains specific DNA sequences recognized by RNA polymerase and associated transcription factors.