MDCAT Biology MCQ #467

According to the chemiosmotic model, ATP is synthesized when protons flow down their electrochemical gradient through which specific pathway?

MDCAT Biology MCQ #467

  1. Question 1

    Q1. According to the chemiosmotic model, ATP is synthesized when protons flow down their electrochemical gradient through which specific pathway?

    • A) Stroma to thylakoid lumen
    • B) Matrix to intermembrane space
    • C) Cytosol to mitochondrial matrix
    • D) Thylakoid lumen to stroma

    Answer: Thylakoid lumen to stroma

    Explanation: Protons move from the thylakoid lumen to the stroma through ATP synthase; moving into the lumen builds the gradient.