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Biology · 2025 · 1 mark
CBSE 2025 · Region 2 · Set 2 · Q15
Assertion (A): Secondary immune response is quicker and stronger than the primary immune response. Reason (R): Our body appears to have the memory of…
Assertion (A) : Secondary immune response is quicker and stronger than the primary immune response.
Reason (R) : Our body appears to have the memory of the first encounter therefore response to the subsequent encounter with the same pathogen is quick.
Official answer
(A)
Both (A) and (R) are true and (R) is the correct explanation of (A).
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CBSE Class 12 Biology past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.