Cellular respiration

2. A harmless byproduct formed at the end of the electron transport chain.
3. The first step of respiration where glucose is broken down.
4. The glucose molecule that acts as the starting fuel for respiration.
5. The gas required for aerobic respiration to act as the final electron acceptor.
6. The jelly-like substance where glycolysis occurs.
10. The final stage of aerobic respiration that produces the most energy.
13. The organelle known as the powerhouse where most energy is produced.

1. The process by which cells break down sugar to create energy.
7. The three-carbon molecule produced at the end of glycolysis.
8. The primary energy currency of the cell produced during respiration.
9. The second stage of respiration that releases carbon dioxide.
10. A byproduct of fermentation in yeast cells.
11. The innermost compartment of the mitochondria where the Krebs cycle occurs.
12. The waste gas exhaled by animals as a byproduct of the Krebs cycle.