Question

State the advantage of using thermostable DNA polymerase.

Hint:

Thermostable DNA polymerases such as Taq polymerase allow for continuous amplification of DNA without the need for enzyme replenishment at each cycle, making PCR highly efficient.

Answer 1

Advantage of Using Thermostable DNA Polymerase 

The use of thermostable DNA polymerase, such as Taq polymerase, offers significant advantages in the Polymerase Chain Reaction (PCR) process. Here's why it is preferred:

1. Ability to Withstand High Temperatures:

Thermostable DNA polymerases like Taq polymerase can withstand the high temperatures (usually between 94-98°C) required during the denaturation step of PCR. This is crucial as it ensures the enzyme remains active throughout the PCR process.

2. No Need for Fresh Enzyme Addition:

Since the thermostable polymerase can endure the high temperatures, there is no need to add fresh enzyme after each PCR cycle. This not only saves time but also increases the efficiency of the process by reducing the need for additional steps.

Conclusion:

The use of thermostable DNA polymerase makes the PCR process more efficient, cost-effective, and time-saving, as it eliminates the need for repeated enzyme additions during the amplification process.