C1.2 Cell respiration

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Across
  1. 1. The primary energy carrier molecule in all living cells
  2. 4. The narrow gap between the inner and outer mitochondrial membranes where protons are pumped during the electron transport chain to build up a charge
  3. 6. Key electron carrier that accepts electron during redox reactions in respiration
  4. 9. The folded inner membrane of the mitochondria where the electron transport chain is found
  5. 14. Apparatus used to measure the rate of cellular respiration by monitoring oxygen consumption or carbon dioxide production
  6. 17. The fluid-filled space inside the inner membrane of the mitochondria where the Krebs cycle takes place
  7. 19. A series of carrier proteins embedded in the inner mitochondrial membrane that pass electrons from reduced NAD/FAD to oxygen, releasing energy to pump protons
  8. 21. The enzyme in the inner mitochondrial membrane that catalyses the synthesis of ATP from ADP and phosphate, driven by the flow of protons
  9. 22. The organelle in eukaryotic cells where the Krebs cycle and electron transport chain take place, making it the main site of aerobic respiration
  10. 23. Another election carrier that accepts electrons during the Krebs cycle to become FADHâ‚‚
Down
  1. 2. The process of adding a phosphate group to a molecule, which requires energy
  2. 3. Chemical reaction that removes a carboxyl group from a molecule, releasing it as carbon dioxide
  3. 5. The first stage of cellular respiration, occurring in the cytoplasm, where glucose is converted into pyruvate
  4. 7. The form of cellular respiration that does not require oxygen, and produces a low yield of ATP
  5. 8. A series of reactions in the mitochondrial matrix where acetyl groups are oxidised and decarboxylated, producing ATP, reduced NAD, reduced FAD, and carbon dioxide
  6. 10. A chemical reaction involving both oxidation and reduction
  7. 11. The molecule that is left after ATP has been used, can be recharged with energy to make ATP again
  8. 12. The loss of electrons from a substance
  9. 13. The gain of electrons by a substance
  10. 15. The process where protons flow down their electrochemical gradient through the enzyme ATP synthase, providing the energy to synthesise ATP
  11. 16. A molecule formed from the oxidation and decarboxylation of pyruvate, which carries the two-carbon acetyl group into the Krebs cycle
  12. 18. The waste product of anaerobic respiration in humans and other animals, formed from the reduction of pyruvate to regenerate NAD+
  13. 20. The form of cellular respiration that requires oxygen, and produces a high yield of ATP