What is the function of the promoter region in a transcription unit?

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It provides a binding site for RNA polymerase to initiate transcription.

It codes for repressor protein.

It signals the termination of transcription.

It attaches the mRNA to the ribosome for translation.

answer is B.

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Detailed Solution

The promoter plays a crucial role in transcription as it serves as the recognition site for RNA polymerase, the enzyme responsible for transcribing DNA into RNA.

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