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,
Polymerase chain reaction (PCR) allows researchers to amplify DNA in a test tube. This process uses an enzyme derived from heat-resistant bacteria. The steps of PCR are driven by changes in temperature. Originally created for DNA Interactive (http://www.dnai.org). TRANSCRIPT: Polymerase chain reaction (PCR) is a process where many copies of a specific piece of DNA can be made. This is known as amplification. Double-stranded DNA (red) unwinds and separates when the temperature is increased.