This is the optimal temperature for the thermophilic. So thermo is heat filling, is loving, so, heat loving DNA polymerase called taq. So, tag DNA polymerase. The polymerase begins DNA synthesis on the primers and elongates in a five to three direction on both ends. And this is shown in the following diagram. So the DNA polymerase attaches onto this five prime primer and it moves along this direction, synthesizing the complementary strand to this DNA molecule.