Crossword

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Across
  1. 4. 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.
  2. 5. any of a number of organized or specialized structures within a living cell.
  3. 6. minute particle consisting of RNA and associated proteins, found in large numbers in the cytoplasm of living cells. They bind messenger RNA and transfer RNA to synthesize polypeptides and proteins
  4. 7. 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 (cristae).
  5. 11. the material or protoplasm within a living cell, excluding the nucleus.
  6. 12. organelle in the cytoplasm of eukaryotic cells containing degradative enzymes enclosed in a membrane.
centrioles minute cylindrical organelle near the nucleus in animal cells, occurring in pairs and involved in the development of spindle fibers in cell division
  7. 13. cells which do not have a cell nucleus, and lack other things eukaryotes
  8. 15. space or vesicle within the cytoplasm of a cell, enclosed by a membrane and typically containing fluid.
  9. 17. a microscopic network of protein filaments and tubules in the cytoplasm of many living cells, giving them shape and coherence
  10. 18. a microscopic membrane of lipids and proteins that forms the external boundary of the cytoplasm of a cell or encloses a vacuole, and that regulates the passage of molecules in and out of the cytoplasm.
Down
  1. 1. organelle found in eukaryotic cells. thick protuberances that project from the much larger cell body
  2. 2. cells contain a nucleus surrounded by a membrane and whose DNA is bound together by proteins (histones) into chromosomes.
  3. 3. a network of tubular membranes within the cytoplasm of the cell, occurring either with a smooth surface or studded ribosomes Involved in the transport of materials.
  4. 4. scientific theory which describes the properties of cells.
  5. 8. of vesicles and folded membranes within the cytoplasm of most eukaryotic cells, involved in secretion and intracellular transport.
  6. 9. slender threadlike structure, especially a microscopic whiplike appendage that enables many protozoa, bacteria, spermatozoa, etc., to swim.
  7. 10. a minute cylindrical organelle near the nucleus in animal cells, occurring in pairs and involved in the development of spindle fibers in cell division.
  8. 14. small dense spherical structure in the nucleus of a cell during interphase.
  9. 16. (in green plant cells) a plastid that contains chlorophyll and in which photosynthesis takes place.
  10. 19. present in most eukaryotic cells, typically a single rounded structure bounded by a double membrane, containing the genetic material.