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Q.

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

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a

It signals the termination of transcription.

b

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

c

It codes for repressor protein.

d

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