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B and T lymphocytes arise from _____________

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B and T lymphocytes arise from _____________

(a) hematopoietic stem cells

(b) germ cells

(c) somatic cells

(d) spermatocytes

The question was asked in an interview for internship.

Question is taken from The Immune Response in section Immune Response of Cell Biology

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The correct answer is (a) hematopoietic stem cells

The best explanation: B and T cells arise from the same precursor – hematopoietic stem cells that undergo different pathways of differentiation. B-lymphocytes target the extracellular pathogens whereas the T-lymphocytes attack intracellular pathogens.

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