If any protein encoding gene is expressed in a heterologous host, is called a

Options

A. recombinant protein
B. primary protein
C. secondary protein
D. tertiary protein

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the term used when a protein-encoding gene is expressed in a heterologous host. A heterologous host refers to a different organism than the one from which the gene originated.

2. **Identifying Key Terms**:
- **Protein-Encoding Gene**: A segment of DNA that contains the instructions to produce a specific protein.
- **Heterologous Host**: An organism that is different from the organism from which the gene is derived.

3. **Exploring Options**: The options provided are:
- Recombinant Protein
- Primary Protein
- Secondary Protein
- Tertiary Protein

4. **Defining Recombinant Protein**:
- A recombinant protein is a protein that is produced from recombinant DNA technology. This involves inserting a gene of interest into an expression vector, which is then introduced into a host organism (heterologous host) to produce the desired protein.

5. **Conclusion**: Based on the definitions and understanding of recombinant proteins, the correct answer to the question is **Recombinant Protein**. This is because the protein is expressed in a different organism (heterologous host) than the one it was originally derived from.

**Final Answer**: The correct term is **Recombinant Protein**.

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