BIOLOGY 2B03 Lecture Notes - Purkinje Cell, Cell Membrane, Bacteria
7 Nov 2013
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Document Summary
An autonomous biological unit (smallest unit of life) Basic structural, functional and biological unit of all living organisms. Single closed compartment surrounded by 1 or 2 plasma membranes. Nucleoid consists of single circular dna membrane and isn"t enclosed by it"s own membrane. Reproduced through a simplified cell division (fission) May be unicellular or exist as colonies. Compromise all multi-cellular plants and animals: ex. Fungi (multicellular bacteria and unicellular yeast: protozoans (unicellular) Complex internal organization s: contain a membrane-bound nucleus w/ most of cell"s genetic material, eu true, karyotes - nucleus. Activities are compartmentalized, extensive internal membrane holds various compartments (organelles) Single purkinje neuron cell- elaborate, continuous single plasma membrane for single cell. Cytoplasm: large collection of membrane-bound organelles that increase efficiency of functions by confining them to small spaces, network of structural proteins allow communication and movement within the cell. Membrane-bound, structurally discrete nucleus & compartmentalized membrane- bound organelles w/ discrete functions.
