For using Ti plasmid as a vector, researchers have eliminated its

Options

A. ability of transfer DNA into plants while keeping its tumour causing properties.
B. ability to cause tumor while keeping its properties to transfer DNA into plants.
C. ability to transfer DNA into plants while keeping its insecticidal properties
D. insecticidal properties while keeping its cancer causing properties.

Answer

To solve the question regarding the use of Ti plasmid as a vector, we will follow these steps:

### Step-by-Step Solution:

1. **Understanding Ti Plasmid**:
- Ti plasmid (Tumor-inducing plasmid) is a type of plasmid found in the bacterium *Agrobacterium tumefaciens*. It is known for its ability to transfer DNA into plant cells and induce tumor formation.

2. **Purpose of Using Ti Plasmid as a Vector**:
- Researchers use Ti plasmid as a vector for genetic engineering in plants because it can introduce foreign DNA into plant cells effectively.

3. **Elimination of Tumor-Inducing Genes**:
- To use Ti plasmid safely and effectively as a vector, researchers have eliminated the tumor-inducing genes from the plasmid. This means that while the plasmid retains its ability to transfer DNA into plant cells, it no longer causes tumors.

4. **Analyzing the Options**:
- **Option A**: Ability to transfer DNA into plant cell while keeping its tumor causing ability. (Incorrect)
- **Option B**: Ability to cause tumor while keeping its property to transfer DNA into plants. (Correct)
- **Option C**: Ability to transfer DNA into plants while keeping its insecticidal properties. (Incorrect)
- **Option D**: Eliminate its insecticidal properties while keeping its cancer causing properties. (Incorrect)

5. **Conclusion**:
- The correct answer is **Option B**: Researchers have eliminated its tumor-causing ability while retaining its ability to transfer DNA into plant cells.