Cellular Respiration

2. another electron carrier molecule made during the Krebs cycle.
6. an electron carrier molecule made during glycolysis and the Krebs cycle.
7. the fluid inside the cell where glycolysis happens.
8. usable power for the cell, stored mainly in ATP
9. oxygen (O2), which picks up electrons at the end of the chain.
11. a 3-carbon intermediate molecule formed during glycolysis.
13. the second stage of respiration in the mitochondria; breaks down pyruvate, makes NADH, FADH2, CO2, and 2 ATP.
16. the part of the cell where most of cellular respiration happens.
18. the opposite process of respiration; uses sunlight, CO2, and water to make glucose and oxygen.
19. the third stage of respiration; uses NADH and FADH2 to make 32–34 ATP.
21. a 3-carbon product of glycolysis (also called pyruvic acid).
22. a waste gas released during respiration.

1. the process that releases energy from sugar to make ATP
3. gas needed for aerobic respiration; acts as the final electron acceptor
4. processes that do not need oxygen.
5. processes that need oxygen.
10. the step in glycolysis where 2 ATP are used to get the process started.
11. a sugar molecule (C6H12O6) that is the starting fuel for respiration
12. the step in glycolysis where 4 ATP and 2 NADH are produced.
14. the main energy molecule cells use to do work.
15. another product made at the end of respiration
17. the first stage of respiration; splits glucose into two pyruvate molecules in the cytoplasm; makes 2 ATP and 2 NADH.
20. a protein in the mitochondria that makes ATP using energy from electron carriers.