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In case of acquired immune system, a secondary immune response is generated by the ______________

(a) memory B-cells

(b) germ cells

(c) lymphoid tissues

(d) antigens

This question was posed to me in final exam.

My question is taken from Immune Response topic in division Immune Response of Cell Biology

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Right answer is (a) memory B-cells

Explanation: A few activated B-cells remain in the lymphoid tissue as memory B-cells. These cells generate a secondary immune response by differentiating into plasma cells upon a second encounter with the same antigen.

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