NEET Zoology Immunity MCQ Question
Which combination of statements correctly describes immunity and allergic reactions?
Acquired immunity is pathogen specific and characterized by memory; allergens cause exaggerated immune responses.
Natural killer cells are responsible for phagocytosing allergens; primary immune responses are always intense.
IgE antibodies are produced in response to pathogens; cytokines protect infected cells from all types of pathogens.
Allergens are always harmful and are the sole cause of allergies; acquired immunity does not involve memory.
Correct Answer
Detailed Explanation
Statement A is correct as it accurately describes acquired immunity and allergies. Statement B incorrectly attributes phagocytosis to natural killer cells and mischaracterizes primary immune responses. Statement C misrepresents the role of IgE antibodies and cytokines. Statement D falsely claims that allergens are always harmful and misrepresents acquired immunity.
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