MDCAT Biology MCQ #465

During the light-dependent reactions, water is split into protons, electrons, and oxygen. Where exactly does this photolysis process occur?

MDCAT Biology MCQ #465

  1. Question 1

    Q1. During the light-dependent reactions, water is split into protons, electrons, and oxygen. Where exactly does this photolysis process occur?

    • A) Photosystem I
    • B) Stroma
    • C) Photosystem II
    • D) ATP synthase complex

    Answer: Photosystem II

    Explanation: Photolysis occurs at PSII to replace lost electrons; PSI receives electrons from the transport chain rather than direct water splitting.