What might be the effect on the transport of lactose into the cytosol of E.coli if a drug is added that allows H⁺ to freely pass through the inner bacterial membrane? A) There would be no effect. B) Lactose transport would increase. C) Lactose transport would cease. D) Lactose would be transported out of the cytosol and into the periplasm.

Question

Quizplus · Accepted Answer

The transport of lactose into E. coli is coupled with the proton gradient across the inner membrane. If H+ can freely pass through the membrane, the proton gradient would dissipate, stopping lactose transport.

What Might Be the Effect on the Transport of Lactose