Science Vocab Chapter 5

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Across
  1. 3. The cellular organelle that directs the protein-building process.
  2. 6. The membrane-bound region of a eukaryotic cell that contains the genetic material.
  3. 8. The internal balance within the systems of nonliving organims that must be kept stable in order to maintain life.
  4. 10. The movement of substances across a cell membrane from regions of low concentration to regions of high concentration by any means that requires the use of energy.
  5. 11. The pressure exerted by water in a full central vacuole upon the cytoplasm and cell membrane of a plant cell; maintains plant rigidity.
  6. 12. A cellular organelle found in plant cells that contains the pigment chlorophyll and is the site where photosynthesis takes place.
  7. 13. or as a sensory organelle.
  8. 14. Describes cells lacking a true nucleus and membrane-bound organelles.
  9. 15. Describes a solution whose solute concentration is less than the solution concentration of the cytoplasm in a cell.
  10. 20. A structure made of two or more tissues that work together to perform a particular function.
  11. 26. The genetic material of eukaryotic cells consisting of DNA and associated proteins.
  12. 29. A protective coating found outside the cell walls of many bacteria.
  13. 31. A thin layer of phospholipids and proteinsthat defines the boundary of a cell.
  14. 32. Transports compounds around the cell and helps maintain the cell's shape; is studded with ribosomes and processes t
  15. 34. A whip-like cellular organelle similar in structure to a cilium but longer and used primarily for movement in many bacteria.
  16. 37. The two layers of phospholipids that make up a cell membrane.
  17. 38. A rigid structure made by cells of plants, fungi, and most bacteria to surround the cell membrane.
  18. 39. A short, hairclike extension of a cell used either form
  19. 41. Describes a solution whose solute concentration is equal to the solutie concentration of the cytoplasm in a cell.
  20. 42. A type of passive transport in which substances can move across a cell membrane through special protein chanells embedded in the membrane.
  21. 43. The non-membrane-bound region in prokaryotic cells that contains most of the genetic material.
Down
  1. 1. A cellular signaling mechanism in which the product of a particular process inhabits the process itself
  2. 2. The cellular organelle in which aerobic
  3. 4. A group of two or more organs that work together to perform a particular function.
  4. 5. An organism consisting of two or more cells and whose cells may not live independently apart from the organism.
  5. 7. The thick fluid inside cells that contains the organelles. Also called the cytosol.
  6. 8. Describes a solution whose solute concentration is greater than the solute concentration of the cytoplasm in a cell.
  7. 9. An organism consisting of only one cell.
  8. 16. Individual organisms of the same species living closely together.
  9. 17. A cellular organelle that functions in the organization of microtubules.
  10. 18. Describes cells having a true nucleus as well as membrane-bound organelles.
  11. 19. takes place to release energy from food.
  12. 21. The diffusion of water molecules through a semipermeable membrane.
  13. 22. A non-pigmented cellular organelle found in plant cells whose functions include storing starches, lipids, and proteins.
  14. 23. One of the fundamental models of biology that states that cells are the smallest form of life, come from preexisting cells, are the basic building block of all life forms and carry out life processes to maintain homeostasis.
  15. 24. The movement of substances across a cell membrane without the need for energy.
  16. 25. Structures found within the cytoplasm of cells that perform the various functions cells need to stay alive.
  17. 26. An organelle in plant cells that holds materials and helps maintain the cell's shape through turgor pressure.
  18. 27. A stack of disc-shaped thylakoids within a chloroplast.
  19. 28. A cellular signing mechanism in which the product of a particular process enhances the process itself.
  20. 30. system of membranes that modifies and packages proteins for export by the cell
  21. 33. A spherical structure within a eukaryotic cell's nucleus where ribosomes are manufactured.
  22. 35. The structure within cells that helps define their shape, maintains internal organization, and aids in division and movement.
  23. 36. proteins made by ribosomes.
  24. 40. A group of cells that are specialized to perform a particular function.