A strain of E.coli is trp? his? lac?.Which medium would this bacterium grow on?
A)lactose + histidine + tryptophan
B)glucose + histidine + tryptophan
C)maltose + histidine + tryptophan
D)minimal glucose, no histidine, no tryptophan
E)glucose + histidine + tryptophan and maltose + histidine + tryptophan

Question

Quizplus · Accepted Answer

The strain is trp- his- lac-, meaning it cannot synthesize tryptophan or histidine and cannot utilize lactose. It requires a medium with glucose (a carbon source it can use) and supplemented with histidine and tryptophan.

A Strain of E