BIO NMDCAT Cytoplasmic Organelles

nmdcat.online July 4, 2026

74. Pumping of protons (H+) by multi-protein complexes of the respiratory chain shifts these ions directly into the

A. Mitochondrial matrix

B. Intermembrane space

✓

C. Cytoplasm matrix

D. Lysosomal cavity

📝 Explanation

Electron flow drives complexes I, III, and IV to pump protons out of the matrix into the intermembrane space, creating a reservoir of high proton concentration.

📖 Additional Information

Mitochondrial matrix
Intermembrane space
Cytoplasm matrix
Lysosomal cavity

Electron flow drives complexes I, III, and IV to pump protons out of the matrix into the intermembrane space, creating a reservoir of high proton concentration.

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