What Is the Mechanism by Which the Herbicides Diuron, Atrazine

question 34

Multiple Choice

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.

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