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

I believe that the reason for using taq polymerase for pcr is that; it is heat stable and can withstand the temperature changes of the cycler. Taq polymerase is isolated from a heat loving bacterium that is naturally found in hot springs, so the enzyme doesn't break down at the high temperatures necessary for copying DNA using a polymerase chain reaction. At high temperatures, Taq polymerase attaches nucleotides to a DNA template, thereby copying the DNA. 

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