This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
For PCR which of the following is not required - 
Select and explain. 
A. Taq polymerase, B. d-NTP, C. Primer, D. Radiolabelled DNA probe
D: Radiolabelled DNA probe
Answer: D: Radiolabelled DNA probe 
Explanation: Following are required in PCR :- Target double stranded DNA, two specific primers, a thermostable DNA polymerase (Taq polymerase), deoxyribonucleotides (dNTP).