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NEET 2023 Phase 1 · BiologyPrevious Year Question

Which one of the following techniques does not serve the purpose of early diagnosis of a disease for its early treatment? (NEET 2023)

Answer: (B) Serum and Urine analysis. Answer: (b) Serum and Urine analysis Solution: Recombinant DNA technology, PCR and ELISA are the techniques that serve the purpose of early diagnosis, because they detect a pathogen at very low concentrations before symptoms appear.

  1. A.Recombinant DNA Technology
  2. B.Serum and Urine analysis✓
  3. C.Polymerase Chain Reaction (PCR) technique
  4. D.Enzyme Linked Immuno-Sorbent Assay (ELISA) technique

Correct Answer

(B) Serum and Urine analysis

Solution & Explanation

Answer: (b) Serum and Urine analysis Solution: Recombinant DNA technology, PCR and ELISA are the techniques that serve the purpose of early diagnosis, because they detect a pathogen at very low concentrations before symptoms appear. Conventional serum and urine analysis can detect a disease only after symptoms/high pathogen load develop, so it does NOT permit early diagnosis. NCERT Reference: Ch 10, p.182, line 42 — "Using conventional"; p.183, line 2 — "Recombinant DNA technology, Polymerase Chain Reaction"

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