Question

Given below are two statements:
Statement I: Methyl viologen, also known as Paraquat, used as herbicide inhibits light reactions of photosynthesis.
Statement II: Paraquat blocks electron flow at plastoquinone acceptors of PS II by competing for binding sites of plastoquinone.
In light of the above statements, choose the most appropriate answer from the options given below:

• A. Both Statement I and Statement II are correct
• B. Both Statement I and Statement II are incorrect
• C. Statement I is correct but Statement II is incorrect
• D. Statement I is incorrect but Statement II is correct

Hint:

Mnemonic: DCMU acts at PSII (D comes before P, II comes after I). Paraquat acts at PSI (P comes later, I comes first).

Answer 1

The Correct Option is C