Question

From which of the following bacteria, thermostable DNA polymerase is isolated?

• A. Agrobacterium
• B. Thermus aquaticus
• C. Methanobacterium
• D. Archaebacteria

Hint:

PCR revolutionized molecular biology using Taq polymerase from Thermus aquaticus.

Answer 1

The Correct Option is B

Step 1: Importance of thermostable polymerase.
PCR requires DNA polymerase that can withstand high temperatures of denaturation cycles.
Step 2: Source organism.
Taq polymerase, the thermostable DNA polymerase used in PCR, is isolated from Thermus aquaticus, a thermophilic bacterium living in hot springs.
Step 3: Conclusion.
Thus, thermostable DNA polymerase is obtained from Thermus aquaticus.