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Biology · 2022 · 2 marks
CBSE 2022 · Region 3 · Set 1 · Q1
A boy developed some allergic reactions when he straight entered into his air conditioned room after a game of football outside his house. Write any…
A boy developed some allergic reactions when he straight entered into his air conditioned room after a game of football outside his house. Write any two symptoms that could be noticed in such condition. How does our body combat such conditions?
Marking-scheme solution
Sneezing, watery eyes, running nose, difficulty in breathing and any other symptom
Body produces IgE antibodies/ give exaggerated response to the antigens/release chemicals like histamine and serotonin from mast cells.
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CBSE Class 12 Biology past-paper question from the 2022 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.