Escherichia coli cells with a mutation in lac Z gene of the lac operon can not grow in a…
Biology · NEET · NTA Exams — Molecular Basis of Inheritance
Escherichia coli cells with a mutation in lac Z gene of the lac operon can not grow in a medium containing only lactose as the source of energy because:
- in the presence of glucose, Escherichia coli cells do not utilize lactose
- they can not transport lactose from the medium into the cell
- the lac operon is constitutively active in these cells
- they can not synthesize functional β-galactosidase
Answer
(D) they can not synthesize functional β-galactosidase
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