Q. Which one is a true statement regarding DNA polymerase used in PCR ?
A) It remains active at high temperature
B) It is used to ligate introduced DNA in recipient cells
C) It serves as a selectable marker
D) It is isolated from a virus
Explanation
[Solution from source] The DNA polymerase used in PCR is Taq polymerase from the bacterium Thermus aquaticus, which stays active at the high temperatures used to denature DNA. It is isolated from a bacterium, not a virus, and it does not ligate DNA or act as a selectable marker. Answer (1).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.