| A | B |
|---|
| Nucleus | controls all cell activity |
| Cytoskeleton | maintains cell shape |
| Cytoplasm | contains the organelles; site of most cell activity |
| Lysosomes | responsible for breaking down and absorbing materials taken in by the cell |
| Plasma cell membrane | regulates what enters and leaves the cell; where cell makes contact with the external environment |
| Ribosomes | build the proteins |
| Golgi Appartus | prepares proteins for use or export |
| Endoplasmic Reticulum (ER) | where most ribosomes do their work |
| Mitochondria | transforms one form of energy into another |
| Prokaryote | has no nucleus |
| Eukaryote | has a nucleus |
