Question
Biology Question on Strategies For Enhancement in Food Production
DCMU
A
inhibits PS-I
B
inhibits PS-II
C
destroys chloroplast
D
inhibits oxidative phosphorylation.
Answer
inhibits PS-II
Explanation
Solution
DCMU (dichlorophenyl methylurea) is an herbicide that inhibits photosynthesis. It blocks the plastoquinone binding site of photosystem II, disallowing the electron flow from where it generated, in photosystem II, to plastoquinone. DCMU only blocks electron flow from photosystem II, it has no effect on photosystem I or other reactions in photosynthesis.