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    In gene therapy of Adenosine Deaminase (ADA) deficiency, the patient requires periodic infusion of genetically engineered lymphocytes because:
    Question

    In gene therapy of Adenosine Deaminase (ADA) deficiency, the patient requires periodic infusion of genetically engineered lymphocytes because:

    A.

    Retroviral vector is introduced into these lymphocytes.

    B.

    Gene isolated from marrow cells producing ADA is introduced into cells at embryonic stages

    C.

    Lymphocytes from patient's blood are grown in culture, outside the body.

    D.

    Genetically engineered lymphocytes are not immortal cells.

    Correct option is D

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