MDCAT Biology MCQ #151

According to the chemiosmotic hypothesis, where is the highest concentration of protons maintained to drive ATP synthesis during the light-dependent reactions?

MDCAT Biology MCQ #151

  1. Question 1

    Q1. According to the chemiosmotic hypothesis, where is the highest concentration of protons maintained to drive ATP synthesis during the light-dependent reactions?

    • A) Thylakoid lumen
    • B) Stroma
    • C) Intermembrane space
    • D) Cytoplasm

    Answer: Thylakoid lumen

    Explanation: Protons are pumped into the thylakoid lumen to create a gradient; the stroma has a lower proton concentration during this process.