The Chemical 3-(3,4-Dichloro-Phenyl)-1,1-Dimethylurea (DCMU)blocks the Movement of Electrons at the Point
The chemical 3-(3,4-dichloro-phenyl) -1,1-dimethylurea (DCMU) blocks the movement of electrons at the point indicated by the black,downward-pointing arrow in the figure below.Which of the following would be an immediate effect of treating a chloroplast with this drug? 
A) Water molecules would be split at a faster rate than when the drug is not present.
B) The amount of NADPH produced by the light reactions would increase.
C) A proton gradient would not be created,so ATP could not be made.
D) The production of water would increase.
Correct Answer:
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