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BIO NMDCAT Cytoplasmic Organelles
nmdcat.online July 4, 2026

61. The high-rate generation of ATP across the inner mitochondrial membrane is directly powered by the immediate downstream action of the

A. Krebs cycle substrate levels
B. Proton electrochemical gradient
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C. Oxygen consumption rate in the matrix
D. Acetyl-CoA supply line

📝 Explanation

The electron transport chain pumps protons into the intermembrane space, building a proton-motive force (proton electrochemical gradient) that drives ATP synthase mechanically.

📖 Additional Information

  • Krebs cycle substrate levels
  • Proton electrochemical gradient
  • Oxygen consumption rate in the matrix
  • Acetyl-CoA supply line

The electron transport chain pumps protons into the intermembrane space, building a proton-motive force (proton electrochemical gradient) that drives ATP synthase mechanically.

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