Immunity pathogens vaccines

NCERT Biology Class 12, Chapter 7

Immunity pathogens vaccines NEET Biology MCQ

Last updated: July 30, 2026

Reviewed by MedQGo Editorial Team | Last updated: July 30, 2026

Which of the following is not a characteristic of adaptive immune response?

Adoes not require antigen stimulation
BT/B cell repertoire has high heterogeneity
Clymphocytes combine with corresponding antigens with high specificity
Dhas the ability to mount secondary responses

Correct answer: A. does not require antigen stimulation

Adaptive immune response requires antigen stimulation, involves highly specific antigen-lymphocyte interaction, and can mount secondary responses. The ability to distinguish 'self' from 'non-self' is also a characteristic of adaptive immunity.

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