Which one of the following enzymes is obtained from Thermophilus aquaticus bacterium which is heat stable and used in PCR at high temperature?: (A) DNA polymerase III, (B) Endonuclease, (C) Taq polymerase, (D) DNA gyrase
Answer is C. ANSWER: (C) Taq polymeraseREF: Lehninger Principles of Biochemistry 4th edition page 321PCR uses a heat-stable DNA polymerase, such as the Taq polymerase (derived from a bacterium that lives at 90 cC), which remains active after every heating step and does not have to be replenished.