cells

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Across
  1. 3. made up of microtubules, actin filaments, and intermediate filaments.
  2. 4. a collection of tissues that structurally form a functional unit specialized to perform a particular function
  3. 6. a slender threadlike structure, especially a microscopic appendage that enables many protozoa, bacteria, spermatozoa, etc. to swim
  4. 8. membrane-enclosed organelles that contain an array of enzymes capable of breaking down all types of biological polymers—proteins, nucleic acids, carbohydrates, and lipids.
  5. 9. the smallest structural and functional unit of an organism
  6. 11. organisms whose cells lack a nucleus and other organelles.
  7. 14. a group of cells that have similar structure and that function together as a unit.
  8. 16. a minute cylindrical organelle near the nucleus in animal cells, occurring in pairs and involved in the development of spindle fibers in cell division.
  9. 18. all biological organisms are composed of cells; cells are the unit of life and all life come from preexisting life.
  10. 20. phospholipid molecules spontaneously form bilayers in aqueous environments.
  11. 21. the gelatinous liquid that fills the inside of a cell.
  12. 22. a small dense spherical structure in the nucleus of a cell during interphase.
  13. 25. protein filaments in the cytoplasm of eukaryotic cells that form part of the cytoskeleton
  14. 27. large, membrane-bound organelles found in plant cells that act as a storage space for water and other molecules in the cell
  15. 29. a large, dynamic structure that serves many roles in the cell including calcium storage, protein synthesis and lipid metabolism.
  16. 30. (in green plant cells) a plastid that contains chlorophyll and in which photosynthesis takes place.
  17. 32. A narrow, hollow tube-like structure found in the cytoplasm (the fluid inside a cell) of plant and animal cells.
Down
  1. 1. 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. Eukaryotes include all living organisms other than the eubacteria and archaebacteria.
  2. 2. a complex of vesicles and folded membranes within the cytoplasm of most eukaryotic cells, involved in secretion and intracellular transport
  3. 5. a highly regulated membrane barrier that separates the nucleus from the cytoplasm in eukaryotic cells
  4. 7. a microscopic membrane of lipids and proteins which forms the external boundary of the cytoplasm of a cell or encloses a vacuole, and regulates the passage of molecules in and out of the cytoplasm.
  5. 10. any of a class of small organelles, such as chloroplasts, in the cytoplasm of plant cells, containing pigment or food
  6. 12. each of a number of flattened sacs inside a chloroplast, bounded by pigmented membranes on which the light reactions of photosynthesis take place, and arranged in stacks or grana.
  7. 13. the central and most important part of an object, movement, or group, forming the basis for its activity and growth
  8. 15. 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.
  9. 17. generate most of the chemical energy needed to power the cell's biochemical reactions.
  10. 19. a 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
  11. 23. a threadlike structure of nucleic acids and protein found in the nucleus of most living cells, carrying genetic information in the form of genes
  12. 24. the aqueous component of the cytoplasm of a cell, within which various organelles and particles are suspended.
  13. 26. a subcellular structure that has one or more specific jobs to perform in the cell
  14. 27. a green pigment, present in all green plants and in cyanobacteria, responsible for the absorption of light to provide energy for photosynthesis. Its molecule contains a magnesium atom held in a porphyrin ring.
  15. 28. a short microscopic hairlike vibrating structure found in large numbers on the surface of certain cells, either causing currents in the surrounding fluid, or, in some protozoans and other small organisms, providing propulsion.
  16. 31. a group of organs that work together in the body to perform a complex function