CBSE 2022 · Region 4 · Set 1 · Q1 · 2 marks
Explain, giving two reasons, how immune response by "vaccine" is different from that by "antitoxin" in humans.
Marking-scheme solution
Immune response by vaccine & Immune response by antitoxin
Immune response is generated by antibodies produced in response to weakened antigen introduced in the body & Immune response is generated by preformed antibodies or antitoxin is injected
Response takes sometime & Quick immune response
Memory cells are generated / long lasting & One time response
Vaccine provides active immunity & Antitoxin provides passive immunity
Human Health and DiseaseImmunityUnderstandvery_short_answermedium
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CBSE Class 12 Biology past-paper question from the 2022board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.