What is the function of the thermostable DNA polymerase used in PCR?

What is the function of the thermostable DNA polymerase used in PCR?
  1. To degrade the DNA
  2. To extend the primers
  3. To remain active during the high temperature induced denaturation of double stranded DNA
  4. To amplify the DNA

Solution

The thermostable DNA polymerase used in PCR, which is isolated from a bacterium called Thermus aquaticus, remains active during the high temperature induced denaturation of double stranded DNA.

Asked in: NCERT

Practice more Biotechnology : Principles and Processes questions on Aicharya