NEET Zoology Immunity MCQ Question
Which of the following statements about immunity are correct?
Acquired immunity is characterized by memory and involves primary and secondary responses.
Phagocytosis is primarily carried out by T-lymphocytes and B-lymphocytes in the blood.
Allergens trigger an exaggerated immune response, primarily involving IgG antibodies.
Interferons are proteins secreted by virus-infected cells that protect non-infected cells from viral infection.
Correct Answer
Detailed Explanation
Acquired immunity indeed involves memory and is characterized by primary and secondary responses. Interferons protect non-infected cells, but phagocytosis is carried out by macrophages and natural killer cells, not T-lymphocytes or B-lymphocytes. Allergens typically trigger IgE antibody responses, not IgG.
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