MDCAT Biology MCQ #237

A toxin disrupts the CF1 particles of the thylakoid membrane. Which mechanism of ATP synthesis is directly halted by this disruption in the chloroplast?

MDCAT Biology MCQ #237

  1. Question 1

    Q1. A toxin disrupts the CF1 particles of the thylakoid membrane. Which mechanism of ATP synthesis is directly halted by this disruption in the chloroplast?

    • A) Active transport of protons
    • B) Direct phosphorylation by NADH
    • C) Diffusion of protons through CF1
    • D) Hydrolysis of water molecules

    Answer: Diffusion of protons through CF1

    Explanation: ATP synthase uses the flow of H+ down their gradient. Option D is wrong because the gradient is established by electron energy, not ATP hydrolysis.