Correct option: (3) Purification of isolated protein
- PCR is Polymerase Chain Reaction.
- It is used for making multiple copies of the gene.
- PCR is used for:
- Gene amplification.
- PCR-based assays have been developed that detect the presence of gene sequences of the infectious agents.
- Detecting mutations.
- Protein is not the target of PCR.
- So, plays no role in its purification.