The colonies of recombinant bacteria appear white because of:

1. Insertional inactivation of alpha-galactosidase in non-recombinant bacteria
2. Insertional inactivation of beta-galactosidase in recombinant bacteria
3. Inactivation of glycosidase enzyme in recombinant bacteria
4. Non-recombinant bacteria containing beta-galactosidase
Subtopic:  Selectable Markers: III | Selection of Recombinant Transformants | Selectable Markers |
 80%
From NCERT
AIPMT - 2013
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh