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vocabulary chapter 3
| Term | Definition |
|---|---|
| Cytoplasm | all of the material inside the plasma membrane of a cell (excluding organelles) |
| Eukaryote | organism that has cells containing a nucleus and other organelles |
| Eukaryotic cells | cell that contains a nucleus and other organelles |
| Nucleus | organelle inside eukaryotic cells that contains most of the cell’s DNA and acts as the control center of the cell |
| Organelle | structure within the cytoplasm of a cell that is enclosed within a membrane and performs a specific job |
| Plasma membrane | thin coat of lipids (phospholipids) that surrounds and encloses a cell |
| Prokaryote | single-celled organism that lacks a nucleus |
| Prokaryotic cell | cell without a nucleus that is found in single-celled organisms |
| Ribosome | organelle inside all cells where proteins are made |
| Virus | tiny, nonliving particle that contains DNA but lacks other characteristics of living cells |
| ATP | energy-carrying molecule that cells use to power their metabolic processes |
| Cell wall | rigid layer that surrounds the plasma membrane of a plant cell and helps support and protect the cell |
| Central vacuole | large saclike organelle in plant cells that stores substances such as water and helps keep plant tissues rigid |
| Chloroplast | organelle in the cells of plants and algae where photosynthesis takes place |
| Cytoskeleton | structure of filaments and tubules in the cytoplasm that provides a cell with an internal framework |
| Endoplasmic reticulum | organelle in eukaryotic cells that helps make and transport proteins |
| Endosymbiotic theory | theory that eukaryotic organelles such as mitochondria evolved from ancient, free-living prokaryotes that invaded primitive eukaryotic cells |
| Golgi apparatus | organelle in eukaryotic cells that processes proteins and prepares them for use both inside and outside the cell |
| Mitochondria | organelle in eukaryotic cells that makes energy available to the cell in the form of ATP molecules |
| Phospholipid bilayer | double layer of phospholipid molecules that makes up a plasma membrane |
| Vacuole | large saclike organelle that stores and transports materials inside a cell |
| Vesicle | small saclike organelle that stores and transports materials inside a cell |