the reason for using taq polymerase for pcr is thatthe reason for using taq polymerase for pcr is thatit has regions that are complementary to the primers.it binds more readily than other polymerases to the primers.only minute amounts are needed for each cycle of pcr.it is heat stable and can withstand the heating step of pcr.it is heat stable, and it binds more readily than other polymerases to the primers.