alleryThe thermostable polymerase used in PCR is taken from:
ABacillus subtilis
BRhizobium meliloti
CClostridium tetani
DThermus aquaticus
Answer & Solution
Correct answer: D. Thermus aquaticus
1. Each cycle heats the DNA until the strands separate.
2. An ordinary polymerase would be destroyed by that heat.
3. Thermus aquaticus supplies one that survives it.
_Source: syllabus Biology, Ch 9 'Biotechnology : Principles and Processes'_
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