| Term | Definition |
| Metabolism | The chemical process which occurs in an organism |
| Photosynthesis | The process by which plants make glucose from carbon dioxide and water |
| Cellular Respiration | The process by which both plants and animals metabolize glucose to provide energy for the cell. |
| ATP | The compound produced in cellular respiration which provides most of a cells energy. |
| Nucleolus | Makes ribsomal RNA. |
| Nucleoplasm | Jelly-like liquid which holds the contents of the nucleus, similar to the cytoplasm outside the nucleus. |
| Nuclear envelope | The membrane that separates the nucleus from the cytoplasm. |
| Nuclear pores | Gate keepers which control proteins going into the nucleus and RNA going out of the nucleus into the cytoplasm. |
| Rough ER | Studded with ribosomes. |
| Smooth ER | Few ribosomes. |