Promoter is a part of transcription unit which does not help:

Options

A. in initiation of transcription process
B. as a binding site for RNA polymerase.
C. transferring the activated amino acids to the mRNA ribosome for protein synthe sts.
D. Both (a) and (b)

Explanation

**Step-by-Step Solution:**

1. **Understanding the Promoter**: The promoter is a specific sequence of DNA located at the beginning of a gene. It is essential for the initiation of transcription, which is the first step in gene expression.

2. **Role of the Promoter**: The promoter serves as a binding site for RNA polymerase, the enzyme responsible for synthesizing RNA from the DNA template. When RNA polymerase binds to the promoter, it initiates the transcription process.

3. **Direction of Transcription**: The promoter also defines the direction in which transcription occurs and indicates which DNA strand will be transcribed into RNA.

4. **Identifying the Incorrect Role**: The question asks for the role that the promoter does not play. The options include:
- A) Initiation of transcription
- B) Binding site for RNA polymerase
- C) Transferring the activated amino acid
- D) Both A and B

5. **Analyzing the Options**:
- Options A and B are both correct roles of the promoter.
- Option C, which involves transferring activated amino acids, is not a function of the promoter. This process is related to translation and involves transfer RNA (tRNA), not the promoter.

6. **Conclusion**: Therefore, the promoter does not help in transferring the activated amino acid, making option C the correct answer.

**Final Answer**: The promoter does not help in transferring the activated amino acid (Option C).

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