Thermostable enzymes Taq and Pfu isolated from thermophilic bacteria are

DNA polymerases

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DNA ligases

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Restriction endonucleases

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RNA polymerases

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Solution

The correct option is A DNA polymerases
Thermophilic bacteria that live in hot springs and hydrothermal vents. Taq polymerase and Pfu polymerase are enzymes isolated from thermophilic bacteria. These enzymes are used in polymerase chain reaction as these enzymes are able to withstand the protein-denaturing conditions (high temperature) required during polymerase chain reaction ( PCR ).
So, the correct option is 'DNA polymerases'.

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