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#9 | Selectable Markers: III
(Zoology) > Biotechnology: Principles and Processes
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Related Practice Questions :
In the screening process during rDNA experiments, clones that metabolize -gal turn:
1. Colorless
2. Blue
3. Yellow
4. Green
66%
From NCERT
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NEET 2026 - Target Batch - Vital
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How are transformants selected from nontransformants?
| 1. | Presence of more than one recognition site in the vector DNA. |
| 2. | Presence of alien DNA into the vector DNA results into insertional inactivation of selectable marker. |
| 3. | Antibiotic resistance gene gets inactivated due to insertion of alien DNA. |
| 4. | Both 2 and 3. |
82%
From NCERT
AIIMS - 2014
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Insertional inactivation of a gene helps in
| 1. | Identification of recombinant clones |
| 2. | Identification of deletion mutants |
| 3. | Identification of recombinant transformants |
| 4. | Elimination of suppression mutants |
79%
From NCERT
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Insertional inactivation of the lac Z gene forms-
| 1. | Blue recombinant colonies |
| 2. | Colourless recombinant colonies |
| 3. | Fluorescent green colonies |
| 4. | There is no relation between the lac Z gene and colour of the colony. |
71%
From NCERT
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Which of the following would you choose as the safest and least cumbersome selectable marker-
| 1. | Ampicillin resistance gene |
| 2. | Tetracyclin resistance gene |
| 3. | Kanamycin resistance gene |
| 4. | b Galactosidase gene |
69%
From NCERT
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