Q. 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)
Explanation
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
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.