1 Breathe in deeply through your nose, expanding your abdomen and then filling your lungs with air. 2  Hold your breath for a couple of seconds. 3  Breathe out slowly through your mouth and empty your lungs completely.  Repeat for 5 to 10 minutes.
PCR is the enzymatic amplification of a specific DNA sequence in vitro9. This process uses multiple cycles of template denaturation, primer annealing, and primer elongation to amplify DNA sequences. It is an exponential process since the amplified products from each previous cycle serve as templates for the next cycle of amplification,
It is one of the most significant advances in science. The process involves copying a portion of DNA with a small molecular machine called polymerase, an enzyme, to duplicate DNA regions in a test tube. The process can be repeated to produce billions of DNA molecules in a few hours. Unlike other types of analysis, this DNA analysis process can reproduce DNA using a tiny sample of cells.