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Cell Biology (Cell Structure)

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Jon Thompson

on 11 March 2011

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Transcript of Cell Biology (Cell Structure)

The semipermeable membrane enclosing the cytoplasm of a cell. Cell Membrane Mitochondria An organelle in the cytoplasm of cells that functions in energy production Smooth Endoplasmic Reticulum An endoplasmic reticulum that is tubular in form (rather than sheet-like) and lacks ribosomes
It's functions include lipid synthesis, carbohydrates, metabolism, calcium concentration, drug detoxification, and attachment of receptors on cell membrane proteins Rough Endoplasmic Reticulum An endoplasmic reticulum, a eukaryotic organelle made up of a system of membranous tubes and sacs, that is studded with ribosomes on its surface giving it a rough appearance Ribosomes Small round particles in a cell made up of RNA and protein that are primarily involved in the assembly of proteins by translating messanger RNA (a process called translation) Golgi Body An organelle found in most eukaryotic cells
Are stacked, flattened membranes which sort proteins and other cellular substances and package them into membrane-bound structures called vesicles Vesicle A bubble-like membranous structure
Stores and transports cellular products, and digests metabolic wastes within the cell
An intracellular membranous sac that is separated from the cytosol by at least one lipid bilayer Vacuole A membrane-bound vesicle found in the cytoplasm of a cell whose function includes intracellular secretion, excretion, storage, and digestion Lysosome Organelles containing a large range of digestive enzymes used primarily for digestion and removal of excess or worn-out organelles, food particles, and engulfed viruses or bacteria Nuclear Envelope Nucleous The large, membrane-bounded organelle that contains the genetic material, in the form of multiple linear DNA molecules organized into structures called chromosomes Nucleolus The round granular structure within the nucleus of a cell, and composed of protein and RNA Chromosomes A structure within the cell that bears the genetic material as a thread-like linear strand of DNA bonded to various proteins in the nucleus of eukaryotes cells, or as circular strand of DNA (or RNA in some viruses) in the cytoplasm of prokaryotes and in the mitochondrion and chloroplast of certain eukaryotes Cell Biology A double-layered membrane that encloses the contents of the nucleus during most of the cell's lifecycle Jon Thompson Vacuole Vacuole
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