Is a technique widely used in molecular biology.
Used for quickly "cloning" a particular piece of DNA in the test tube, and
searching for genes of interest
It can only replicate fairly small pieces of DNA
PCR allows early diagnosis of malignant diseases such as leukemia and lymphomas.
PCR also permits identification of non-cultivatable or slow-growing microorganisms such as mycobacteria, anaerobic bacteria or viruses.
The basis for PCR diagnostic applications in microbiology is the detection of infectious agents and the discrimination of non-pathogenic from pathogenic strains by virtue of specific genes.
PCRs have a variety of uses, including “genetic fingerprinting” at the crime scene.
This is often critical for forensic analysis,, when only a trace amount of DNA is available as evidence.
PCR machine (thermal cycler)