A proteinaceous compound in which the three-dimensional structure is very important in determining whether or not the activation energy of a particular biological reaction will be lowered sufficiently for the reaction to take place at normal temperatures.
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Membrane-bound organelle within all eukaryotic cells which serves to contain the DNA that directs all of the cell's activites.
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A small (approximately bacteria-sized) eukaryotic structure whose function is to provide large quantities of ATP for the cell in which it is found.
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A small structure found within the nucleus whose job is to produce the small structures that leave the nucleus to help with protein synthesis.
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A small structure that is produced in a portion of the nucleus and whose job in life is to produce proteins.
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A universal, selectively permeable cell covering.
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Tubular structure located in the cytoplasm of the cell; general function is to increase membrane surface area within the cell for fat metabolism to take place.
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A specialized vacuole (vesicle) containing digestive enzymes which are released when a cell becomes damaged beyond repair or in cases where materials from the cell are needed in other parts of an organism's body to construct new features.
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Outermost covering of plant cell; function is to provide support for the cell, thus maintaining its shape.
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A small (approximately bacteria-sized) eukaryotic structure whose function is to provide large amounts of surface area, along with proper enzymes for photosynthesis to take place.
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