The electron transport chain of a eukaryotic cell is located in the
Correct answer: A. inner mitochondrial membrane
- A. inner mitochondrial membrane
- B. outer mitochondrial membrane
- C. mitochondrial matrix
- D. cytosol
Explanation
The cytochromes and other carriers are embedded in the inner membrane, whose folding into cristae provides the surface area, and the same membrane is impermeable enough to hold the proton gradient that chemiosmosis depends on. The outer membrane is freely permeable to small molecules and so could never maintain a gradient. In prokaryotes the equivalent chain sits on the plasma membrane.
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About Cellular Respiration
Cellular respiration releases energy from glucose through glycolysis, the link reaction, the Krebs cycle and the electron transport chain, producing ATP. The pathway differs in oxygen availability: aerobic respiration uses oxygen and yields more ATP, while anaerobic respiration produces much less ATP and forms lactic acid in muscles or ethanol and carbon dioxide in yeast.
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