Q5 of 57 Page 84

Can a disease be detected before its symptoms appear? Explain the principle involved.

Yes, some of the diseases can be detected before its symptoms like using PCR (Polymerase chain reaction) which is used to amplify a nucleic acid to obtain an amplified gene product which can show diseases before its symptoms.

Another method for detection of a disease before the symptoms is ELISA (i.e., Enzyme-Linked Immunosorbent Assay) which can give the concentration of antigens or a specific antibody, which can be used for detection of disease before its symptoms.


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