Biotechnology and its ApplicationsGene Therapy 1 2022 Medium In gene therapy of Adenosine Deaminase (ADA) deficiency, the patient requires periodic infusion genetically engineered lymphocytes because: A Genetically engineered lymphocytes are not immortal cells. B Retroviral vector is introduced into these lymphocytes. C Gene isolated from marrow cells producing ADA is introduced into cells at embryonic stages D Lymphocytes from patient's blood are grown in culture, outside the body. Check Answer