Cellular Respiration

1. An anaerobic process that allows glycolysis to continue by regenerating NAD⁺.
6. The innermost compartment of the mitochondrion where the Krebs cycle occurs.
8. The final stage of aerobic respiration where most ATP is made using electrons from NADH and FADH₂.
10. A type of fermentation in muscle cells that produces lactic acid as a byproduct.
14. The energy currency of the cell, produced during cellular respiration.
18. The organelle where most of cellular respiration occurs.
19. The first stage of cellular respiration where glucose is broken down into pyruvate in the cytoplasm.
20. Respiration that occurs without oxygen; produces less ATP

2. The final electron acceptor in the electron transport chain; combines with H⁺ to form water.
3. An enzyme that produces ATP from ADP and phosphate using the proton gradient in the ETC.
4. A byproduct of the electron transport chain formed when oxygen accepts electrons.
5. Cellular respiration that requires oxygen and produces a high amount of ATP.
7. A six-carbon sugar that serves as the main fuel for cellular respiration.
9. The folds of the inner mitochondrial membrane where the electron transport chain occurs.
11. The three-carbon molecule produced at the end of glycolysis.
12. A cycle of reactions in the mitochondrial matrix that produces NADH, FADH₂, and CO₂.
13. Another electron carrier that is reduced during the Krebs cycle.
15. An electron carrier used during glycolysis and the Krebs cycle
16. A type of fermentation in yeast that produces ethanol and carbon dioxide.
17. A waste product released during the Krebs cycle and pyruvate oxidation.