Hepatitis B is diagnosed through laboratory tests that determine the presence of HBA-DNA in blood serum of the patient. What reference method is applied for this purpose?

Answer options

1. Hybridization method
2. Polymerase chain reaction
3. Ligase chain reaction method
4. ELISA diagnostic method
5. Hybridization signal amplification method

Explanation

A polymerase chain reaction is a tool that you can use to focus on a segment of DNA and copy it billions of times over. PCR is used every day to diagnose diseases, identify bacteria and viruses, match criminals to crime scenes, and in many other ways.