Gene responsible for synthesis of hirudin protein was introduced in :

Options

A. Gossypium
B. Tomato
C. Brassica napus
D. Secale cereale

Answer

To answer the question regarding the gene responsible for the synthesis of hirudin protein, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Hirudin**:
- Hirudin is a naturally occurring anticoagulant, which means it helps to prevent blood clotting. It is secreted by the salivary glands of medicinal leeches.

2. **Identify the Source of Hirudin**:
- The medicinal leech that produces hirudin is scientifically known as *Hirudo medicinalis*.

3. **Genetic Engineering of Hirudin**:
- In biotechnology, the gene that encodes for the synthesis of hirudin was chemically synthesized.

4. **Introduction into a Plant**:
- This synthesized gene was introduced into a plant species known as *Brassica napus* (commonly known as rapeseed or canola).

5. **Method of Introduction**:
- The gene was introduced into *Brassica napus* using a method called Agrobacterium-mediated transformation, which is a common technique in plant genetic engineering.

6. **Resulting Transgenic Plant**:
- The resulting transgenic plant, *Brassica napus*, began to produce seeds that accumulated hirudin.

7. **Purification and Use**:
- The hirudin extracted from these seeds was later purified and utilized for medicinal purposes.

### Final Answer:
The gene responsible for the synthesis of hirudin protein was introduced in *Brassica napus*.

---