Q1: The advantage of using DNA polymerases from thermophilic organisms in PCR is that

ANS:B - the DNA polymerases of these bacteria can withstand the high temperatures needed to denature the DNA strands

The polymerase chain reaction is a thermo-cycling process involving high temperature as 94°C, DNA polymerase of thermophilic bacteria can survive such temperature. An example is a commonly used Taq-polymerase enzyme isolated from Thermophylus aquatics.