- A It is the cheapest enzyme available for routine laboratory use
- B It is thermostable (heat-resistant from Thermus aquaticus bacterium)
- C It has the highest proofreading fidelity of any known polymerase
- D It is the only DNA polymerase known to exist in bacteria
Correct answer: B. It is thermostable (heat-resistant from Thermus aquaticus bacterium)
Explanation: Taq polymerase from the thermophilic bacterium Thermus aquaticus is heat-stable, surviving repeated PCR denaturation cycles at 95 C.
Concept context
Recombinant DNA, GMOs, PCR, CRISPR, and biotechnology applications. Growing importance in NEET.
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