A suitable method of transformation with recombinant DNA for plants in which cells are bombarded with high velocity micro-particles of gold or tungsten coated with DNA is:

Options

A. Biolistics
B. Microinjection
C. Gene gun
D. Both (1) and (3)

Answer

To solve the question regarding the suitable method of transformation with recombinant DNA for plants, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for a method of transformation in plants that involves bombarding cells with high-velocity micro-particles coated with DNA.

2. **Identifying Key Terms**: The key terms in the question are "high velocity micro-particles," "gold or tungsten," and "coated with DNA." These terms hint towards a specific technique used in plant biotechnology.

3. **Reviewing the Options**:
- **Biolistic**: This method involves the use of a gene gun to shoot DNA-coated micro-particles into plant cells.
- **Microinjection**: This method uses a fine needle to inject DNA directly into cells, which does not involve the use of micro-particles.
- **Gene Gun**: This is another name for the biolistic method, where DNA-coated micro-particles are used to deliver genetic material into cells.
- **Both first and third**: This option suggests that both the biolistic method and the gene gun are correct.

4. **Analyzing the Techniques**:
- The biolistic method and gene gun are synonymous, as both refer to the technique of using high-velocity micro-particles to deliver DNA into plant cells.
- Microinjection is not applicable here since it does not involve the use of micro-particles.

5. **Conclusion**: Since the biolistic method and gene gun are the same technique, the correct answer is that the suitable method of transformation is both the first and third options: **Biolistic and Gene Gun**.

### Final Answer:
The suitable method of transformation with recombinant DNA for plants in which cells are bombarded with high velocity micro-particles of gold or tungsten coated with DNA is: **Both first and third (Biolistic and Gene Gun)**.

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