This is usually defined as the end site of the process of transcription

Options

A. Regulater
B. Promoter
C. Terminator
D. Operator

Answer

To solve the question, "This is usually defined as the end site of the process of transcription," we will analyze the options provided: regulator, promoter, terminator, and operator.

### Step-by-Step Solution:

1. **Understanding Transcription**:
- Transcription is the process of synthesizing RNA from a DNA template. It involves several key sequences that play different roles in the process.

2. **Identifying Key Sequences**:
- **Promoter**: This is a region of DNA where RNA polymerase binds to initiate transcription. It is not the end site but the starting point.
- **Regulator**: These are sequences that can influence the transcription process but are not specifically the end site.
- **Operator**: This is a segment of DNA that a repressor can bind to, inhibiting transcription. It is also not the end site.
- **Terminator**: This is a specific sequence in the DNA that signals the end of transcription. When RNA polymerase reaches this sequence, it stops transcription.

3. **Conclusion**:
- Among the options provided, the **terminator** is the sequence that defines the end site of the transcription process. Therefore, the correct answer is **terminator**.

### Final Answer:
The end site of the process of transcription is the **terminator**.

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