Cells

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  1. 3. a small dense spherical structure in the nucleus of a cell during interphase
  2. 6. a network of membranous tubules within the cytoplasm of a eukaryotic cell, continuous with the nuclear membrane. It usually has ribosomes attached and is involved in protein and lipid synthesis
  3. 7. a rigid layer of polysaccharides lying outside the plasma membrane of the cells of plants, fungi, and bacteria. In the algae and higher plants it consists mainly of cellulose
  4. 8. In biology, an organ (from the Latin "organum" meaning an instrument or tool) is a collection of tissues that structurally form a functional unit specialized to perform a particular function
  5. 10. (in green plant cells) a plastid that contains chlorophyll and in which photosynthesis takes place
  6. 12. a dense organelle present in most eukaryotic cells, typically a single rounded structure bounded by a double membrane, containing the genetic material
  7. 14. a complex of vesicles and folded membranes within the cytoplasm of most eukaryotic cells, involved in secretion and intracellular transport
  8. 15. a small fluid-filled bladder, sac, cyst, or vacuole within the body
  9. 18. a membrane-bound organelle which is present in plant and fungal cells and some protist, animal, and bacterial cells
  10. 19. An organelle is a subcellular structure that has one or more specific jobs to perform in the cell, much like an organ does in the body
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  1. 1. cells of or derived from eukaryote characterized by having a distinct, membrane-bound nucleus
  2. 2. A prokaryote is a unicellular organism that lacks a nuclear membrane-enclosed nucleus
  3. 4. a microscopic network of protein filaments and tubules in the cytoplasm of many living cells, giving them shape and coherence
  4. 5. an organelle found in large numbers in most cells, in which the biochemical processes of respiration and energy production occur. It has a double membrane, the inner layer being folded inward to form layers
  5. 9. are macromolecular machines, found within all living cells, that perform biological protein synthesis
  6. 11. a group of cells that have similar structure and that function together as a unit
  7. 13. a thick solution that fills each cell and is enclosed by the cell membrane
  8. 16. the semipermeable membrane surrounding the cytoplasm of a cell
  9. 17. are membrane-enclosed organelles that contain an array of enzymes capable of breaking down all types of biological polymers—proteins, nucleic acids, carbohydrates, and lipids