MDCAT Biology MCQ #393

The splitting of water during photosynthesis releases oxygen, protons, and electrons. In which specific part of the chloroplast does this photolysis occur?

MDCAT Biology MCQ #393

  1. Question 1

    Q1. The splitting of water during photosynthesis releases oxygen, protons, and electrons. In which specific part of the chloroplast does this photolysis occur?

    • A) Stroma
    • B) Outer membrane
    • C) Thylakoid lumen
    • D) Intermembrane space

    Answer: Thylakoid lumen

    Explanation: Photolysis occurs on the inner surface of the thylakoid membrane, releasing protons into the lumen; the stroma is where the Calvin cycle occurs.