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Taq polymerase is an enzyme that is used by scientists in the polymerase chain reaction because it is stable at high temperatures. It is the polymerase used by a bacteria, Thermus auquatics, which... Taq polymerase is an enzyme that is used by scientists in the polymerase chain reaction because it is stable at high temperatures. Large amounts of a sample of DNA are necessary for molecular and genetic analyses, and the polymerase chain reaction is used to amplify very small amounts of DNA.
PCR (polymerase chain reaction) denotes a process that is used to replicate DNA. The first step in PCR, known as denaturing, involves heating a DNA sample to separate its two strands. Once separated the two strands are used as templates to synthesise two new DNA strands. This is done with the help of an enzyme called Taq polymerase.