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The promoter site and the terminator sit...

The promoter site and the terminator site for transcription are located at

A

3' (downstream) end and 5' (upstream) end, respectively of the transcription unit.

B

5' (upstream) end and 3' (downstream) end, respectively of the transcription unit.

C

the 5' (upstream) end.

D

the 3' (downstream) end.

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The correct Answer is:
To answer the question about the locations of the promoter site and the terminator site for transcription, we can break it down into the following steps: ### Step-by-Step Solution: 1. **Understanding Transcription**: Transcription is the process by which RNA is synthesized from a DNA template. It involves the binding of RNA polymerase to specific regions of the DNA. 2. **Identifying the Promoter Site**: The promoter is a specific sequence of DNA where RNA polymerase binds to initiate transcription. It is located at the 5' end of the coding strand. This means that the promoter is positioned upstream of the transcription start site. 3. **Identifying the Terminator Site**: The terminator is a sequence that signals the end of transcription. It is located at the 3' end of the coding strand, meaning it is downstream of the transcription start site. 4. **Defining Upstream and Downstream**: In molecular biology, "upstream" refers to the direction toward the 5' end of the DNA strand, while "downstream" refers to the direction toward the 3' end. Therefore, the promoter is upstream (5' end), and the terminator is downstream (3' end) of the transcription unit. 5. **Conclusion**: Based on the above points, we can conclude that the promoter site is located at the 5' upstream end, and the terminator site is located at the 3' downstream end of the transcription unit. ### Final Answer: The promoter site is located at the 5' upstream end, and the terminator site is located at the 3' downstream end of the transcription unit. ---
To answer the question about the locations of the promoter site and the terminator site for transcription, we can break it down into the following steps: ### Step-by-Step Solution: 1. **Understanding Transcription**: Transcription is the process by which RNA is synthesized from a DNA template. It involves the binding of RNA polymerase to specific regions of the DNA. 2. **Identifying the Promoter Site**: The promoter is a specific sequence of DNA where RNA polymerase binds to initiate transcription. It is located at the 5' end of the coding strand. This means that the promoter is positioned upstream of the transcription start site. ...
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