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NEET 2016 Phase 1 · BiologyPrevious Year Question

Antivenom injection contains preformed antibodies while polio drops that are administered into the body contain:

Answer: (D) Attenuated pathogens. Answer: (D) Attenuated pathogens Solution: Antivenom contains ready-made (preformed) antibodies, giving passive immunity.

  1. A.Activated pathogens
  2. B.Harvested antibodies
  3. C.Gamma globulin
  4. D.Attenuated pathogens✓

Correct Answer

(D) Attenuated pathogens

Solution & Explanation

Answer: (D) Attenuated pathogens Solution: Antivenom contains ready-made (preformed) antibodies, giving passive immunity. In contrast, a vaccine such as the oral polio drops introduces a preparation of antigenic proteins or an inactivated/weakened (attenuated) pathogen into the body, so the body itself produces antibodies and memory cells — this is active immunity. Why not the others: They are not activated/virulent live pathogens (the vaccine strain is weakened); harvested antibodies and gamma globulin describe passive immunity (like the antivenom), which is exactly what polio drops are NOT. NCERT Reference: NCERT Ch7, p.136, lines 27-28: "a preparation of antigenic proteins of pathogen or inactivated/weakened pathogen (vaccine) are introduced into the body"

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