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The name of DNA polymerase used in PCR is:

1. a) DNA polymerase I
2. b) RNA polymerase
3. c) Taq polymerase
4. d) DNA ligase

Correct answer: c) Taq polymerase

Solution

Taq polymerase is heat-stable, so it remains active after the repeated high-temperature denaturation steps in PCR. The other options do not function as the standard thermostable enzyme for DNA amplification.

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