Q.

The Taq polymerase enzyme is obtained from:                [2016]

1 Bacillus subtilis  
2 Pseudomonas putida  
3 Thermus aquaticus  
4 Thiobacillus ferrooxidans  

Ans.

(3)

Taq polymerase, generally used in PCR is isolated from thermophilic bacterium Thermus aquaticus.