In genetic engineering which is used for transfer of genes from one cell to another

Options

A. Vector
B. Probe
C. Plasmid
D. Virus

Answer

To answer the question "In genetic engineering, which is used for transfer of genes from one cell to another?", we will analyze the options provided and identify the correct answer step by step.

### Step 1: Understand the Question
The question is asking about the mechanism or tool used in genetic engineering to transfer genes between cells.

### Step 2: Analyze the Options
The options given are:
1. Vector
2. Probe
3. Plasmid
4. Virus

### Step 3: Define Each Option
- **Vector**: A vector is a vehicle or carrier that is used to transfer foreign genetic material into another cell. Vectors can be plasmids or viruses.
- **Probe**: A probe is a single-stranded DNA or RNA sequence that is used to detect complementary sequences in a sample genome. It does not transfer genes.
- **Plasmid**: A plasmid is a small circular DNA molecule that can replicate independently of chromosomal DNA. Plasmids can act as vectors.
- **Virus**: A virus can also serve as a vector to deliver genetic material into host cells.

### Step 4: Identify the Correct Answer
The term "vector" encompasses both plasmids and viruses, as they can both be used to transfer genes. Therefore, the most accurate and general term for the transfer of genes from one cell to another is **vector**.

### Conclusion
The correct answer to the question is **vector**.

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