MDCAT Biology MCQ #204

During chemiosmosis, protons are pumped across a membrane to create a gradient. In which specific compartment do protons accumulate in a chloroplast?

MDCAT Biology MCQ #204

  1. Question 1

    Q1. During chemiosmosis, protons are pumped across a membrane to create a gradient. In which specific compartment do protons accumulate in a chloroplast?

    • A) Stroma of the chloroplast
    • B) Mitochondrial matrix
    • C) Thylakoid lumen
    • D) Cytosol of the cell

    Answer: Thylakoid lumen

    Explanation: In chloroplasts, protons are pumped into the thylakoid lumen; in mitochondria, they are pumped into the intermembrane space.