| Term | Definition |
| cell membrane | controls passage of material into and out of cell |
| cell wall | supportive layer, outside the cell membrane |
| chloroplast | found in plants, organelle found in plants, stores energy in the form of glucose, site of photosynthesis |
| cytoplasm | jelly-like substance contained inside the cell |
| cytoskeleton | network of filaments that serve a variety of support mechanical and transport functions |
| ER | organelle that transport substances made by the cell |
| golgi apparatus (complex) | organelle that packages and distributes molecules |
| lysosome | recycling organelle, contains digestive enzymes |
| mitochondria | organelle that releases energy from food, powerhouse |
| ribosome | organelle that is responsible for protein synthesis |
| water vacuole | organelle for storage of water in a plant cell |
| prokaryote | unicellular organism lacking a nucleus |
| eukaryote | A cell that contains a nucleus and membrane bound organelles |
| nucleus | a part of the cell containing DNA and RNA and responsible for growth and reproduction |
| nucleolus | produces ribosomes |
| organelles | structures in a cell with a specific function |
| chromatin | long strands of DNA found in the eukaryotic cell nucleus; condense to form chromosomes |
| centrioles | found in animal cells, two small structures that move to the ends of the cell. The spindle fibers are connected to these |