alleryWhy must the DNA polymerase in PCR be thermostable?
AIt must survive the denaturation heat
BIt must cut DNA at high temperature
CIt must join primers to the vector
DIt must break open the cell wall
Answer & Solution
Correct answer: A. It must survive the denaturation heat
Each cycle heats DNA to separate the strands, and only a heat-stable polymerase stays active across cycles.
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