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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.
The most commonly used DNA polymerase for PCR is Taq DNA polymerase, which has an error rate of approximately 1 Ã 10 â5 errors per base. This error rate is relatively high due to the enzyme's lack of 3â²â5â² exonuclease (proofreading) activity.aq DNA polymerase is suitable for most PCR applications that do not require a high-fidelity enzyme, such as detecting specific DNA or RNA sequences. The error rate of Taq DNA polymerase is approximately 1 Ã 10 â5 errors/base, although the fidelity does depend somewhat on the reaction conditions.