Where would you use the technique of DNA amplification called PCR amongst the following application ?

Options

A. Microinjection
B. Diganosis of HIV infection
C. Palaentology
D. All of these

Answer

**Step-by-Step Solution:**

1. **Understanding PCR**: PCR stands for Polymerase Chain Reaction. It is a technique used to amplify a specific segment of DNA, allowing researchers to create millions of copies of a particular DNA sequence in vitro (outside a living organism).

2. **Applications of PCR**: PCR has numerous applications in various fields, including:
- **Medical Diagnosis**: PCR can be used to detect the presence of specific pathogens (viruses or bacteria) by amplifying their DNA. This helps in diagnosing infections and diseases.
- **Paleontology**: PCR is used to analyze ancient DNA from fossils, which can help in understanding evolutionary biology and the genetics of extinct species.
- **Microinjection**: In genetic engineering, PCR is often used to amplify DNA that can then be injected into embryos to create genetically modified organisms.

3. **Evaluating the Options**: The question asks where PCR would be applicable among the given options. Since PCR is essential for amplifying DNA for diagnosis, paleontological studies, and microinjection, it is relevant to all these applications.

4. **Conclusion**: Therefore, the answer to the question is that PCR can be used in all of the mentioned applications.

**Final Answer**: PCR is applicable in all of the given options.

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