Answer: Adenosine deaminase.
- A Salivary amylase
- B Adenosine deaminase
- C DNA joining ligase
- D A restriction enzyme
Correct answer: B. Adenosine deaminase
Explanation: The first clinical gene therapy corrected adenosine deaminase (ADA) deficiency, a cause of severe combined immunodeficiency (SCID).
Concept context
GM crops, transgenic animals, gene therapy, molecular diagnostics, and bioethics. Frequent 2–3 mark questions in NEET.