Which of the following is an application of the polymerase chain reaction?
Correct answer: D. Detecting a virus from a tiny sample of its DNA
- A. Taking X ray images
- B. Transfusing blood
- C. Dialysing a patient's blood
- D. Detecting a virus from a tiny sample of its DNA
Explanation
PCR amplifies trace DNA millions of times, making it detectable in diagnosis, forensics and research. The other options are medical procedures that involve no DNA amplification.
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Biotechnology applies genetic engineering, cell culture and recombinant DNA methods to medicine and public health. The material includes production of insulin, vaccines and antibiotics, diagnostic techniques, gene therapy, genetically modified organisms and the ethical concerns surrounding manipulation of human genes.
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