BIO206H5 Lecture Notes - Lecture 2: Nuclear Membrane, Chlorophyll, Organelle
Document Summary
(cid:858)eu(cid:859) = true, (cid:858)karyon(cid:859) = kernel, nut or nucleus. The eucaryotic cell: bigger and more elaborate (as compared with prokaryotes, some live as single-celled orgs (e. g. Amoeba, yeasts: other live in multicellular assemblies. Golgi apparatus (ga: stacks of flattened membrane-enclosed sacs, receives and often chemically modifies the molecules made in the er & then directs to the exterior of the cell or to various locations inside the cell. Lysosomes : small, irregularly shaped organelles in which intracellular digestion occurs. [i. e. releasing nutrients from food particles and breaking down unwanted molecules for recycling or excretion] Peroxisomes : small, membrane-enclosed vesicles that provide a contained env. for rxns in which hydrogen peroxide, a dangerously reactive chemical, is generated and degraded. Cytosol : concentrated aqueous gel of large & small molecules, site of many chemical rxns that are fundamental to the cell"s existence (e. g. manufacture of proteins)
