Hirudin can be extracted from transgenic plant

Options

A. Brassica napus
B. Bacillus napus
C. Bt brinjal
D. Bt Brassica napus

Answer

### Step-by-Step Solution

1. **Understanding Hirudin**:
- Hirudin is an anticoagulant, which means it prevents blood from clotting. It works by inhibiting thrombin, a key enzyme in the blood clotting process.

2. **Role of Thrombin**:
- Thrombin converts fibrinogen (a soluble plasma protein) into fibrin (an insoluble protein), which forms the mesh that constitutes a blood clot. If thrombin is inhibited, blood clotting does not occur.

3. **Source of Hirudin**:
- Hirudin is naturally found in leeches, which secrete it to prevent blood clotting while they feed.

4. **Transgenic Plants**:
- To produce hirudin in a plant, scientists use recombinant DNA technology (RDT). This involves inserting the gene responsible for producing hirudin into a plant's DNA.

5. **Identifying the Transgenic Plant**:
- The question specifies that hirudin can be extracted from transgenic plants. The specific transgenic plant mentioned is **Brassica napus** (also known as rapeseed or canola).

6. **Conclusion**:
- Therefore, the correct answer to the question is that hirudin can be extracted from the transgenic plant **Brassica napus**.