<prompt> In PCR, DNA polymerase is used inDNA replicationDNA ElongationDNA MulitiplicationAll  <response>: All PCR applications employ a heat-stable DNA polymerase, such as Taq polymerase an enzyme originally isolated from the bacterium Thermus aquatics.This DNA polymerase enzymatically assembles a new DNA strand from DNA building blocks, the nucleotides, by using single-stranded DNA as a template and DNA oligonucleotides also called DNA primers, which are required for initiation of DNA synthesis. 