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Organelles

Organelles and their jobs

TermDefinition
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.
Created by: a620594