This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of nucleic acids, Subject name: Biochemistry
In PCR 
Select and explain. 
A. Thermostable enzyme is needed, B. 211 copies formed after 'n' members of multiple, C. Non specific, D. Thermolabile enzyme
A: Thermostable enzyme is needed
Answer: A: Thermostable enzyme is needed 
Explanation: The enzyme is not denatured at high temperature The polymerase reaction allowed to take place at 72 *c for 30 seconds in presence of dNTP