A selectable marker is used to:
Answer: (A) help in eliminating the non-transformants, so that the transformants can be regenerated. Answer: (1) help in eliminating the non-transformants, so that the transformants can be regenerated Solution: A selectable marker in a cloning vector helps in identifying and eliminating non-transformants while selectively permitting the growth of transformants (e.g., antibiotic-resistance genes).
- A.help in eliminating the non-transformants, so that the transformants can be regenerated✓
- B.identify the gene for a desired trait in an alien organism
- C.select a suitable vector for transformation in a specific crop
- D.mark a gene on a chromosome for isolation using restriction enzyme
Correct Answer
(A) help in eliminating the non-transformants, so that the transformants can be regenerated
Solution & Explanation
Answer: (1) help in eliminating the non-transformants, so that the transformants can be regenerated Solution: A selectable marker in a cloning vector helps in identifying and eliminating non-transformants while selectively permitting the growth of transformants (e.g., antibiotic-resistance genes). It is not used to identify a desired trait gene, choose a vector, or mark genes for restriction isolation. The given key 'A' corresponds to option (1). NCERT Reference: Ch 9, p.169, line(s) 14 — "selectable marker, which helps in identifying and eliminating non-"