Which of the following is transcribed and then translated to form a protein product ?

Options

A. Gene for t-RNA
B. Intron
C. Gene for transcription factor
D. Fatty acid

Answer

To determine which of the following is transcribed and then translated to form a protein product, we need to understand the processes of transcription and translation in molecular biology.

### Step-by-Step Solution:

1. **Understanding Transcription and Translation**:
- Transcription is the process where DNA is converted into RNA. This RNA can be messenger RNA (mRNA), transfer RNA (tRNA), or ribosomal RNA (rRNA).
- Translation is the process where the mRNA is read by ribosomes to synthesize proteins.

2. **Identifying the Options**:
- We need to evaluate the options provided to see which one corresponds to the process of being transcribed into RNA and then translated into a protein.

3. **Analyzing Each Option**:
- **Gene for tRNA**: While tRNA is essential for protein synthesis, it is not translated into a protein itself; it serves as an adapter molecule.
- **Intron**: Introns are non-coding sections of RNA that are spliced out during RNA processing. They do not code for proteins.
- **Gene for transcription factor**: Transcription factors are proteins that help initiate transcription but are not directly translated from the gene themselves.
- **Fatty acid**: Fatty acids are not nucleic acids and do not undergo transcription or translation.

4. **Conclusion**:
- The correct answer is the **gene for tRNA**. While tRNA itself is not translated into a protein, it is essential for the translation of mRNA into proteins. However, if we consider the context of the question, the gene that codes for proteins is the most relevant, and typically, mRNA is the product that is transcribed and then translated into a protein.

### Final Answer:
The correct answer is the **gene for tRNA**, as it is involved in the translation process, although it is not itself translated into a protein.