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A polymerase chain reaction, or PCR, consists of three steps: DNA denaturation, primer annealing and extension. These steps are repeated between 20 and 35 times to synthesize the correct quantity of the DNA of interest. Each of these steps requires a different temperatu...


PCR, or polymerase chain reaction, uses repeating cycles of heating and cooling to replicate strands of DNA from a sample. PCR can amplify and copy a single gene from a sample multiple times.


The three-step PCR process, or polymerase chain reaction, is used to amplify or copy DNA sequences. First, the two strands of DNA separate. Second, RNA primers anneal or attach to the DNA. Third, heat stable polymerase copies the DNA sequence.


PCR in biology stands for polymerase chain reaction. It refers to a process of multiplying or amplifying a small amount of DNA to carry out more conclusive research or data analysis.


The purpose of PCR is to amplify small amounts of a DNA sequence of interest so it can be analyzed separately. PCR can be used to make a large amount of a specific piece of DNA or to test a DNA sample for that sequence.


The polymerase chain reaction cycle is a three-step process that includes denaturation, annealing and elongation. This cycle is used to amplify a specific gene from a copy of DNA. It is used in forensics to isolate blood at crime scenes to determine if suspects were pre...


A PCR machine, also known as a thermal cycler, is a DNA amplifier that regulates temperature and amplifies segments of DNA via the polymerase chain reaction. As Wikipedia points out, PCR machines are also sometimes used to facilitate reactions regarding enzyme digestion...