What is the mechanism by which the herbicides diuron, atrazine and terbutryn are able to kill plants?
A)They bind to the manganese ions of chlorophyll.
B)They block electron transport through PSII.
C)They act as competitive inhibitors of reduced plastiquinone binding to chlorophyll a.
D)They act as noncompetitive inhibitors of reduced plastiquinone binding to the D1 protein of PSII.
E)They bind to hemoglobin.

Question

Quizplus · Accepted Answer

Diuron, atrazine, and terbutryn are known as PSII inhibitors. They all block the electron transport chain in PSII by binding to the D1 protein, which results in the inhibition of photosynthesis and eventual death of the plant.

What Is the Mechanism by Which the Herbicides Diuron, Atrazine