Respiration

4. Processes that occur without oxygen to produce energy.
5. The first step in respiration where glucose is broken down into pyruvate, producing a small amount of energy.
8. The process of adding a phosphate group to a molecule, such as in the production of ATP.
10. A series of reactions in the mitochondria that produce energy molecules, like NADH, from pyruvate.
11. The main energy molecule used by cells for various functions.
12. Processes that require oxygen to produce energy.
13. An anaerobic process that breaks down pyruvate to produce energy when oxygen is not available.

1. The fluid inside cells where many chemical reactions, like glycolysis, occur.
2. A molecule that carries energy and electrons to the electron transport chain during respiration.
3. Organelle in cells that produce energy through respiration.
6. The process by which cells break down glucose to produce energy.
7. The folded inner membranes of mitochondria where the electron transport chain occurs.
8. A product of glycolysis that is used in further energy-producing processes.
9. The fluid inside the mitochondria where the Krebs cycle occurs.