Across
- 4. A molecule formed from pyruvate that enters the Krebs cycle and helps start energy-producing reactions.
- 6. The movement of hydrogen ions (H⁺) across the inner mitochondrial membrane that drives the production of ATP.
- 11. Processes that do not require oxygen.
- 12. The area between the inner and outer membranes of the mitochondria.
- 14. (ETC) A series of proteins in the inner mitochondrial membrane that use high-energy electrons to make lots of ATP.
- 16. A process cells use to break down food molecules (like glucose) to release energy the cell can use.
- 17. Acid Cycle) A series of reactions in the mitochondria that break down Acetyl CoA to produce energy carriers like NADH and FADH₂.
- 18. An anaerobic process where cells convert pyruvate into lactic acid to make ATP when oxygen is low (like in muscles during intense exercise).
Down
- 1. The fluid-filled space inside the inner membrane of the mitochondria where the Krebs cycle occurs.
- 2. An anaerobic process used by yeast and some bacteria where pyruvate is turned into alcohol and carbon dioxide while making a small amount of ATP.
- 3. Another energy-carrying molecule made in the Krebs cycle; it also delivers electrons to the electron transport chain.
- 5. The main energy molecule cells use to power activities.
- 7. The highly folded membrane inside the mitochondria that contains the proteins for the electron transport chain.
- 8. The first step of cellular respiration where glucose is split into two molecules of pyruvate, producing a small amount of ATP.
- 9. A molecule made at the end of glycolysis; it is the starting point for the next steps of respiration.
- 10. Processes that do require oxygen.
- 13. An energy-carrying molecule made during glycolysis and the Krebs cycle; it brings high-energy electrons to the electron transport chain.
- 15. A molecule in the Krebs cycle that combines with Acetyl CoA to form citrate and restart the cycle.