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| the semipermeable membrane surrounding the cytoplasm of a cell |
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| a rigid layer of polysaccharides lying outside the plasma membrane of the cells of plants, fungi, and bacteria. |
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| the central and most important part of an object, movement, or group, forming the basis for its activity and growth |
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| a small dense spherical structure in the nucleus of a cell during interphase |
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| the aqueous component of the cytoplasm of a cell, within which various organelles and particles are suspended |
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| an organelle near the nucleus of a cell that contains the centrioles (in animal cells) and from which the spindle fibers develop in cell division |
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| a microscopic single-celled organism, including the bacteria and cyanobacteria, that has neither a distinct nucleus with a membrane nor other specialized organelles |
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| an organism consisting of a cell or cells in which the genetic material is DNA in the form of chromosomes contained within a distinct nucleus |
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| the material or protoplasm within a living cell, excluding the nucleus |
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| a coenzyme used as the main energy storage and transfer molecule in the cells of all known organisms |
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| Enzymes are proteins that catalyze (i.e., increase or |
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| a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change |
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