NEET Previous Year Question
The colonies of recombinant bacteria appear white in contrast to blue colonies of non-recombinant bacteria because of
Topic: NEET PYQ
Answer: C. Full step-by-step solution below.
- ANon-recombinant bacteria containing β-galactosidase.
- BInsertional inactivation of β-galactosidase in non-recombinant bacteria.
- CInsertional inactivation of β-galactosidase in recombinant bacteria.
- DInactivation of glycosidase enzyme in recombinant bacteria.
Correct answer: C
Solution
(c) In recombinant bacteria, the inserted DNA disrupts the lacZ (β-galactosidase) gene, so β-galactosidase is not produced and the colonies appear white. Non-recombinant bacteria produce β-galactosidase and form blue colonies.More Biotechnology & its Applications PYQs
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