MDCAT Biology MCQ #552

A plant is treated with a chemical that blocks Photosystem II. Which process will still occur in cyclic photophosphorylation but fail in non-cyclic?

MDCAT Biology MCQ #552

  1. Question 1

    Q1. A plant is treated with a chemical that blocks Photosystem II. Which process will still occur in cyclic photophosphorylation but fail in non-cyclic?

    • A) The activation of Photosystem I by light
    • B) The occurrence of photolysis of water
    • C) The movement of electrons through plastoquinone
    • D) The synthesis of ATP via chemiosmosis

    Answer: The occurrence of photolysis of water

    Explanation: Photolysis only occurs in non-cyclic flow to replace electrons in PS II; cyclic flow does not involve water splitting.