- A The cytochrome electron transport chain embedded along the cristae membrane
- B Krebs cycle enzymes, mitochondrial DNA, and ribosomes
- C Free water with no dissolved enzymes or genetic material whatsoever
- D ATP synthase complexes alone, projecting from the inner membrane surface
Correct answer: B. Krebs cycle enzymes, mitochondrial DNA, and ribosomes
Explanation: Mitochondrial matrix contains Krebs cycle enzymes, circular mitochondrial DNA, 70S ribosomes, and other soluble components.
Concept context
Cell theory, prokaryotic vs eukaryotic cells, organelles and their functions. Foundation of all biology.