The blue and white selectable markers have been developed which differentiate recombinant colonies from non-recombinant colonies on the basis of their ability to produce colour in the presence of a chromogenic substrate.
Given below are two statements about this method:
Statement I: The blue coloured colonies have DNA insert in the plasmid and they are identified as recombinant colonies.
Statement II: The colonies without blue colour have DNA insert in the plasmid and are identified as recombinant colonies.
 
1. Statement I is correct; Statement II is incorrect
2. Statement I is incorrect; Statement II is correct
3. Both Statement I and Statement II are correct
4. Both Statement I and Statement II are incorrect
Subtopic:  Selection of Recombinant Transformants |
 69%
From NCERT
NEET - 2025
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In recombinant DNA technology antibiotics are used:

1. to keep medium bacteria-free

2. to detect alien DNA

3. to impart disease-resistance to the host plant

4. as selectable markers

Subtopic:  Selection of Recombinant Transformants |
 61%
From NCERT
NEET - 2020
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NEET 2026 - Target Batch - Vital
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NEET 2026 - Target Batch - Vital