Consider the following statements w.r.t transcription and select the right choice
(i) The promoted is said to located towards the 5' - end of the coding strand.
(ii ) The promoted is an RAN sequence that provides a binding site for RNA polymerase.
(iii) The terminator is located towards the 3' end of the coding strand.
(iv) The strand that has polarity `3'rarr5'` acts as a template strand .

Options

A. I & iii are incorrect
B. I & iii are correct
C. Only ii is incorrect
D. Only ii is correct

Answer

To solve the question regarding transcription and evaluate the given statements, let's analyze each statement step by step:

### Step-by-Step Solution:

1. **Statement (i)**: "The promoter is said to be located towards the 5' end of the coding strand."
- **Analysis**: The promoter region is indeed located at the 5' end of the coding strand. This is where RNA polymerase binds to initiate transcription.
- **Conclusion**: This statement is **correct**.

2. **Statement (ii)**: "The promoter is an RNA sequence that provides a binding site for RNA polymerase."
- **Analysis**: The promoter is not an RNA sequence; it is a DNA sequence that provides a binding site for RNA polymerase. Therefore, this statement is incorrect.
- **Conclusion**: This statement is **incorrect**.

3. **Statement (iii)**: "The terminator is located towards the 3' end of the coding strand."
- **Analysis**: The terminator is indeed located at the 3' end of the coding strand. It signals the end of transcription.
- **Conclusion**: This statement is **correct**.

4. **Statement (iv)**: "The strand that has polarity 3' to 5' acts as a template strand."
- **Analysis**: The strand that runs in the 3' to 5' direction is indeed the template strand for transcription. The RNA is synthesized in the 5' to 3' direction using this template.
- **Conclusion**: This statement is **correct**.

### Summary of Statements:
- **Correct Statements**: (i), (iii), and (iv)
- **Incorrect Statement**: (ii)

### Final Answer:
The right choice is that **only statement (ii) is incorrect**.

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