Zoology-Immunity
NEET Zoology Immunity MCQ Question
Type: MCQ-conceptual-Medium-Class 12
Which of the following statements about immunity is correct?
A
Active immunity is pathogen-specific and has a memory component.
B
Interferons are produced by non-infected cells to fight viruses.
C
Primary immune response is stronger than secondary immune response.
D
Antibodies produced during allergic reactions are of IgA type.
Correct Answer
Option A
Detailed Explanation
Active immunity is indeed pathogen-specific and characterized by memory, meaning it provides a more intense response upon subsequent encounters with the same pathogen. Interferons are secreted by virus-infected cells, not non-infected cells, and primary responses are generally of lower intensity than secondary responses. Allergies involve IgE antibodies, not IgA.
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