How does forensic science enable DNA to be extracted from tiny samples on a cigarette butt? The challenge in this game is to use the basic principles of the PCR method to copy the DNA in order to collect enough material to use as evidence.
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PCR is a method by which a few fragments of DNA can be duplicated into millions in a couple of hours. This makes PCR a very useful method in, amongst other fields, forensic science.
The 1993 Nobel Prize in Chemistry was awarded for the invention of PCR, a method that made it possible to copy a large numbers of DNA fragments in only a few hours.