Which of the following polymerases are used in PCR?

DNA polymerase I

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DNA polymerase I

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DNA polymerase III

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Taq polymerase

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Solution

The correct option is D Taq polymerase
Taq polymerase is obtained from Thermus aquaticus which is an archaebacteria that can survive in high temperatures. Due to this, their enzymes are capable of working in unusually high temperature and perfectly suitable for PCR.

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