NEETZoologyBiotechnology and Its Applications
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Techniques like Polymerase Chain Reaction (PCR) and Enzyme Linked Immuno-Sorbent Assay (ELISA) serve the purpose of early diagnosis of a disease. Reason (R): These techniques can detect the presence of a pathogen even when its concentration is very low in the body and clinical symptoms are not yet
Options
- ABoth (A) and (R) are correct and (R) is the correct explanation of (A)
- BBoth (A) and (R) are correct but (R) is not the correct explanation of (A)
- C(A) is correct but (R) is incorrect
- D(A) is incorrect but (R) is correct
Correct answer
A. Both (A) and (R) are correct and (R) is the correct explanation of (A)
Step-by-step solution
Assertion (A) is correct because recombinant DNA technology, PCR, and ELISA are modern molecular diagnostic techniques that allow for the early detection of diseases. Reason (R) is also correct and provides the correct explanation for (A). Conventional methods like serum and urine analysis can only detect pathogens when their concentration is high and symptoms have appeared. In contrast, techniques like PCR can detect very low concentrations of a pathogen by amplifying its nucleic acid, and ELISA can detect early i