CBSE-CLASS-XII SERIES Biology
Immune System
1 previous year questions.
Volume: 1 Ques
Yield: Medium
High-Yield Trend
1
2025 Chapter Questions 1 MCQs
01
PYQ 2025
medium
biology ID: cbse-cla
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.
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.
1
Both (A) and (R) are true and (R) is the correct explanation of (A).
2
Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3
(A) is true, but (R) is false.
4
(A) is false, but (R) is true.