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Organelles
Organelles and their jobs
Term | Definition |
---|---|
nucleus | a dense organelle present in most eukaryotic cells, typically a single rounded structure bounded by a double membrane, containing the genetic material. |
cell wall | a rigid layer of polysaccharides lying outside the plasma membrane of the cells of plants, fungi, and bacteria. In the algae and higher plants, it consists mainly of cellulose. |
cell membrane | the semipermeable membrane surrounding the cytoplasm of a cell. |
chloroplasts | Chloroplasts are the food producers of the cell |
mitochondria | an organelle found in large numbers in most cells, in which the biochemical processes of respiration and energy production occur. It has a double membrane, the inner layer being folded inward to form layers (cristae). |
golgi bodies | a complex of vesicles and folded membranes within the cytoplasm of most eukaryotic cells, involved in secretion and intracellular transport. |
endoplasmic reticulum | a network of membranous tubules within the cytoplasm of a eukaryotic cell, continuous with the nuclear membrane. It usually has ribosomes attached and is involved in protein and lipid synthesis. |
lysosomes | an organelle in the cytoplasm of eukaryotic cells containing degradative enzymes enclosed in a membrane. |
ribosomes | a minute particle consisting of RNA and associated proteins, found in large numbers in the cytoplasm of living cells. They bind messenger RNA and transfer RNA to synthesize polypeptides and proteins. |
vacuoles | a space or vesicle within the cytoplasm of a cell, enclosed by a membrane and typically containing fluid. |
cytoplasm | the material or protoplasm within a living cell, excluding the nucleus. |