Microinjection is a method used in genetic engineering for

Options

A. DNA fingerprinting
B. transformation of animal cells
C. transformation of plant cells
D. transformation of bacteria

Answer

**Step-by-Step Solution:**

1. **Understanding Microinjection**: Microinjection is a technique used in genetic engineering to introduce foreign DNA directly into the cells. This method is particularly useful for transforming animal cells.

2. **Identifying the Purpose of Microinjection**: The primary purpose of microinjection is to facilitate the transformation of host cells with recombinant DNA. This allows for the study of gene function and the production of genetically modified organisms.

3. **Recombinant DNA**: In this context, recombinant DNA refers to DNA that has been artificially created by combining DNA from different sources. This is done using enzymes like ligase.

4. **Direct Gene Transfer**: Microinjection is a method of direct gene transfer, meaning that it allows for the introduction of genetic material without the use of vectors (like plasmids). This is particularly advantageous when working with certain types of cells.

5. **Application in Animal Cells**: In the case of animal cells, microinjection involves using a fine needle or syringe to inject the recombinant DNA directly into the nucleus of the target cell. This method is effective for transforming animal cells.

6. **Exclusion of Other Options**: The question provides several options (DNA fingerprinting, transformation of animal cells, transformation of plant cells, transformation of bacteria). Based on the explanation, microinjection is specifically used for the transformation of animal cells, making it the correct answer.

7. **Final Answer**: Therefore, the correct answer to the question "Microinjection is a method used in genetic engineering for" is **transformation of animal cells**.

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