Match List-I with List-II. List-I List-II (A) Kanamycin (I) Delivers genes into animal cells (B) ClaI (II) Selectable marker (C) Disarmed retroviruses (III) Restriction site (D) Kanamycin R gene (IV) Antibiotic resistance Choose the correct answer from the options given below.
Answer: (C) (A)-(II), (B)-(III), (C)-(I), (D)-(IV). Answer: (3) (A)-(II), (B)-(III), (C)-(I), (D)-(IV) Solution: Kanamycin is an antibiotic whose resistance gene functions as a selectable marker, so the antibiotic itself maps to (II) Selectable marker.
- A.(A)-(IV), (B)-(III), (C)-(I), (D)-(II)
- B.(A)-(II), (B)-(IV), (C)-(I), (D)-(III)
- C.(A)-(II), (B)-(III), (C)-(I), (D)-(IV)✓
- D.(A)-(III), (B)-(I), (C)-(IV), (D)-(II)
Correct Answer
(C) (A)-(II), (B)-(III), (C)-(I), (D)-(IV)
Solution & Explanation
Answer: (3) (A)-(II), (B)-(III), (C)-(I), (D)-(IV) Solution: Kanamycin is an antibiotic whose resistance gene functions as a selectable marker, so the antibiotic itself maps to (II) Selectable marker. ClaI is a restriction enzyme, hence (III) Restriction site. Disarmed retroviruses (I) deliver genes into animal cells. The Kanamycin R gene confers (IV) antibiotic resistance. This gives (A)-II, (B)-III, (C)-I, (D)-IV = option 3. NCERT Reference: Ch 9, p.169, line(s) 19-20 — "the genes encoding resistance to antibiotics such as ampicillin, chloramphenicol, tetracycline or kanamycin, etc., are considered useful selectable markers"