The polymerase chain reaction relies upon unusual,heat- resistant _ that were isolated from bacteria living in hot springs.

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The polymerase chain reaction (PCR) relies on the use of DNA polymerase molecules that are heat-resistant, which were isolated from bacteria living in hot springs such as Thermus aquaticus. These heat-resistant DNA polymerase molecules are able to withstand the high temperatures required for the denaturation step of the PCR process.

The Polymerase Chain Reaction Relies Upon Unusual,heat- Resistant _ That