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| any sibstance that forms hydrogen ions in water and has pH below 7 |
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| any substance that forms hydroxideions in water and has a pH above 7 |
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| atom or group of atoms that gain or lose electrons |
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| all of the chemical reactions that occor within an organism |
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| measure of how acid or basic a solution is |
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| net, random movement of particles from an area or higher concentration to an area of flower concentration |
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| molecule with an unequal distribution of charge |
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| basic building blocks of protein molecules |
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| organic compound used by cells to store and release energy |
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| type of protein found in all living things that increases the rate of chemical reactions |
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| organic compounds community called fats and oils. |
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| complex macromolecules such as RNA and DNA, that store genetic information in cells in the form of a code. |
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| large, complex polymer essential to all life composed of carbon, hydrogen, oxygen, nitrogen, and usually sulfur. |
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| basic unit of all organisms |
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| unicellular or multicellular organisms, such as yeast, plants, and animals, composed of eukaryotic cells, which contain a true nucleus and membrane-bound organelles. |
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| positively charged center of an atom composed of neutrons and positively charged protons surrounding by a cloud of negatively charged electrons. |
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| membrane-bound structures within eukaryotic cells. |
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| unicellular organisms, such as bacteria composed of prokaryote cells. |
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| serves as boundry between the cell and its environment. |
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| a substance membrane or material that absorbs or allows the passage of water. |
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| firm, fairly rigid structure lovated outside the plasma membrane or plants, fungi, most bacteria, and some protists |
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| short, numerous, hairlike projections composed of pairs of microtubles |
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| clear, gelatinous fluid in eukaryotic cells that suspends the cell's organelles and is the site of numerous chemical reactions. |
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| endoplasmic reticulum (E.R.) |
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| organelle in eukaryotic cells with a series of highly folded membranes surrounded in cytoplasm. |
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| long, hairlike projections composed of pairs of microtubles. |
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| organelle in eukaryotic cells with a system of flattened tubular membranes |
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| organelles that contain digestive enzymes |
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| eukarytoc membrane-bound organelles that tranform energy stored in food molecules into ATP |
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| nonmembrane-bound organelles in the nucleus where enzymes and other proteins are assembled |
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| membrane-bound fluid-filled space in the cytoplasm of plant cells used for the temporary storage of materials |
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| diffusion of water across a selectively permeable membrane depending on the comcemtration of solutes on either side of the membrane |
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| energy-expending process by which cells transport materials across the cells membrande against a concentration gradient |
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