| Which one of the following molecular diagnostic technique is used to detect the presence of a pathogen in its early stage of infection? |
| a) | Angiography | b) | Radiography |
| c) | Enzyme replacement technique | d) | Polymerase Chain Reaction (PCR) |
| (d)Presence of a pathogen (bacteria, viruses, etc.) is usually suspected only when the pathogen has produced a diseased symptom. By that time the number of pathogens is already very high in the body but very low count of a bacteria or virus (when the symptoms of the disease are not yet visible) can be detected by multiplication of their nucleic acid by PCR |