Where is the cell membrane found?
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Around the cell. It's what holds all the squishy bits in (cytoplasm etc.)
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Here's what they have in common:\n1. Cell membrane is present.\n2. Vacuoles are present.\n3. Both are living cells.\n4. Mitochondria is present.\n5. Both are eukaryotic cells. \n6. Nucleus, nuclear membrane and chromatin fibers are present.\n7. Both can reproduce through mitosis. (Advanced animal cells reproduce through meiosis)\n\nPS : Don't take note of those who talk of the absence of mitochondria in plants. It's present. Only chloroplast is absent in animal cell.
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Nuclear membrane is formed by a series of  flattened cistenae aligned sideways with gaps called nuclear pores. There are pore complexes guarding the nuclear pores.The flattened cisternae are smooth- surfaced endoplasmic reticulum. It is a typical biological membrane of lipo-protein.\nPlasma membrane is glyco-lipoprotein complex.The overcoat of the plasma membrane is made by the Golgi Complex. It is a complex of carbohydrate side chains along with proteins.The overcoat lies over the bilayer of lipid through with proteins lie across: some  projected,  others buried in the bilayer of lipid. Plasma membrane contains several enzymes and channels connected with transport of ions and small molecular weight substances.
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the electron transport chain occurs in the inner membrane.  the krebbs cycle occurs in the inner matrix and glycolysis occurs in the cytoplasm of the cell
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outer layer: cell wall\ninner layer: cell membrane\ninside:\ncytoplasm, mitochondria, nucleus, chloroplast (all enclosed with membranes), endoplasmic reticulum, ribosoms, vacuoles (which contains various pigments depending upon the cell type and species), dictysomes.
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THERE ARE FOUR DIFFERENCES!!!!!!! NOT THREE. Some people say five\n\n1) Chloroplasts\n2) Central Vacuole and tonoplast (the membrane enclosing the vacuole)\n3) Cell Wall\n4) Plasmodesmata (channels through cells walls that connect cytoplasms of adjac3ent cells.)
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usually at the centre. but sometimes lies in the periphal region if vacuole is too large(vacuole displaces the nucleus eg. in plant cell) \n    its size differs from cell to cell. however  its size is significantly larger than many other cell organelles like ribosome,lysosome, ER, etc but smaller than vacuole in plant cells
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permeability of the cell membrane
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For eukaryotes, in the neucleus. For prokaryotes, the cytoplasm because they don't have a nucleus.
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or·gan·elle  (ôrg-nl)\nn.\nA differentiated structure within a cell, such as a mitochondrion, vacuole, or chloroplast, that performs a specific function.\n\ncell wall\nn.\nThe rigid outermost cell layer found in plants and certain algae, bacteria, and fungi but characteristically absent from animal cells.\n\ncell membrane\nn.\nThe semipermeable membrane that encloses the cytoplasm of a cell. Also called cytomembrane, plasmalemma, plasma membrane.\n\nnu·cle·us  (nkl-s, ny-)\nn. pl. nu·cle·i (-kl-) or nu·cle·us·es \n1. A central or essential part around which other parts are gathered or grouped; a core: the nucleus of a city.\n2. Something regarded as a basis for future development and growth; a kernel: a few paintings that formed the nucleus of a great art collection.\n3. Biology A large, membrane-bound, usually spherical protoplasmic structure within a living cell, containing the cell's hereditary material and controlling its metabolism, growth, and reproduction.\n4. Botany \na. The central kernel of a nut or seed.\nb. The center of a starch granule.\n5. Anatomy A group of specialized nerve cells or a localized mass of gray matter in the brain or spinal cord.\n6. Physics The positively charged central region of an atom, composed of protons and neutrons and containing almost all of the mass of the atom.\n7. Chemistry A group of atoms bound in a structure, such as a benzene ring, that is resistant to alteration in chemical reactions.\n8. Astronomy \na. The central portion of the head of a comet.\nb. The central or brightest part of a nebula or galaxy.\n9. Meteorology A particle on which water vapor molecules accumulate in free air to form a droplet or ice crystal.\n10. Linguistics The part of a syllable having the greatest sonority. In the word middlemost (mdl-mst) the nuclei of the three syllables are (), (l), and (); in the Czech word krk ("neck"), the nucleus is (r).\n\ncy·to·plasm  (st-plzm)\nn.\nThe protoplasm outside the nucleus of a cell.
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The semipermeable membrane that encloses the cytoplasm of a cell.
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cell walls give structure.
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Okay this is a bit of a complicated question, but i'll do my best, in short these are really very different things.\n\nFirst cell membranes are found in all cells (animal, plant, fungi etc.) they are made up of lipids, generally as a bilayer.  take the membrane from around the outside of a eukaryotic cell, its formed from phospolipids - these molecules have a hydrophilic head [ie will disolve in water/ has a charge] (the phosphate bit) and a hydrophobic tail (the lipid (fat) bit). The hydrophobic bits stick together and the hydrophilic bits are open to the solution on each side (search "lipid bilayer" with yahoo! Images if you want a diagram:-) ).  The outer cell membrane is forming a barrier between the inside and outside of the cell, alowing the cell to control the movment of molecules into and out of itself.  There are a lot of other membranes in the cell apart from the outher cell membrane, the endoplasmic reticulum for example is basicly made up of membrane.\n\nThe cell wall on the other hand isn't present in all cells (we humans (along with all other animals) don't get one). The cell wall is present on the extracellular side of the outer cell membrane.  it is hard and ridgid (unlike the membrane that is fluid) it is made up of lond polymers, and serves to protect the cell.  Plant cell walls are made up of mainly cellulose (in fact when you look at a peice of wood all you are really seeing is the leftover cell walls, and the rest of the cell has long gone).  Fungi also have cell walls but this time not made of cellulose but instead made of chitin, the cell wall still serves the same role however.\n\nIn short the membrane lets the cell control what goes in and out,  and the cell wall provides rigidity.  Membranes are made of lipids (fats) and cell walls of long polemers like chitin and cellulose.\n\nI hope this helps to answer your question, and look for some diagrams - it will make it a lot easier.
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an electrical wave that travels down the membrane of a cell
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The endomembrane system is the system of internal membranes within eukaryotic cells that divide the cell into functional and structural compartments, or organelles. Prokaryotes do not have an endomembrane system and thus lack most organelles.\n\nThe endomembrane system also provides a transport system, for moving molecules through the interior of the cell, as well as interactive surfaces for lipid and protein synthesis. The membranes that make up the endomembrane system are made of a lipid bilayer, with proteins attached to either side or traversing them.\n\nThe following organelles are part of the endomembrane system:\n\n    * The plasma membrane is a phospholipid bilayer membrane that separates the cell from its environment and regulates the transport of molecules and signals into and out of the cell.\n    * The nuclear envelope is the membrane around the nucleus of the cell.\n    * The endoplasmic reticulum is a synthesis and transport organelle [the endoplasmic reticulum is an extension of the nuclear envelope].\n    * The Golgi apparatus acts as the packaging and delivery system for molecules.\n    * Lysosomes are the "digestive" units of the cell. They utilize enzymes to break down macromolecules and also act as a waste disposal system.\n    * Vacuoles act as storage units in some cells.\n    * Vesicles are small membrane-enclosed transport units that can transfer molecules between different compartments.
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1) nucleus\n2) vacoule\n3) cell membrane\n4) cytoplasm\n5) chromosomes
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An extention of the cell membrane which has the ability to move providing propulsion to the prokaryote