Which of the following is used to deliver , a desirable gene into an animal cell ?

Options

A. Disarmed retrovirus
B. Disarmed Agrobacterium
C. Disarmed E.coli
D. Both (A) and (C)

Answer

To solve the question "Which of the following is used to deliver a desirable gene into an animal cell?", we can follow these steps:

### Step 1: Understand the Options
The question provides four options:
- A) Disarmed retrovirus
- B) Disarmed Agrobacterium
- C) Disarmed E. coli
- D) Both A and C

### Step 2: Analyze Each Option
1. **Disarmed Retrovirus**: Retroviruses are known for their ability to integrate their genetic material into the host cell's genome. When disarmed, they can be used to deliver specific genes into animal cells without causing disease.

2. **Disarmed Agrobacterium**: Agrobacterium is primarily used for gene transfer in plants, not animals. So, this option is not suitable for delivering genes into animal cells.

3. **Disarmed E. coli**: E. coli is a bacterium often used in genetic engineering, but it is not typically used to deliver genes directly into animal cells.

4. **Both A and C**: Since option C (Disarmed E. coli) is not suitable for gene delivery into animal cells, this option is also incorrect.

### Step 3: Conclusion
Based on the analysis, the most suitable option for delivering a desirable gene into an animal cell is:
- **A) Disarmed retrovirus**

### Final Answer
The correct answer is **A) Disarmed retrovirus**.

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