The drug 2,4-dinitrophenol (DNP) disrupts the proton gradient across the thylakoid membrane.If chloroplasts were incubated in a solution of DNP,
A) oxygen would no longer be reduced to water.
B) no ATP would be synthesized as a consequence of the transport of electrons.
C) chloroplasts would show a burst of increased ATP synthesis.
D) the rate of the Calvin cycle would increase.
E) photosystem II would become overly reduced and would no longer absorb photons of light.

Question

Quizplus · Accepted Answer

DNP disrupts the proton gradient across the thylakoid membrane, which is essential for ATP synthesis. Therefore, no ATP would be synthesized as a consequence of the transport of electrons.

The Drug 2,4-Dinitrophenol (DNP) Disrupts the Proton Gradient Across the Thylakoid