Biology · Principles and Processes in Biotechnology

Taq polymerase used in PCR reactions remains active during high temperature because it is isolated from:

1. A thermo-tolerant fungus, *Neurospora crassa*
2. A thermophilic bacterium, *Thermus aquaticus*
3. A halo-tolerant archaebacterium, *Methanobacterium*
4. An acidophilic cyanobacterium, *Anabaena*