PCR (Polymerase chain reaction)
It’s a technique in molecular biology that permits the analysis of any short sequence of DNA or RNA.
It is used to reproduce selected sections of DNA or RNA for analysis.
Previously, amplification of DNA involved cloning the segments of interest into vectors for expression in bacteria, and took weeks. But now, with PCR done in test tubes, it takes only a few hours. PCR is highly efficient in that untold numbers of copies can be made of the DNA.
SOURCE:The 7th Baltic congress in laboratory medicine,Paruu11.09.2004.