Across
- 2. The two layers of phospholipids that make up a cell membrane.
- 3. Transports compounds around the cell and helps maintains the cell's shape; is studded with ribosomes and processes the proteins made by ribosomes.
- 10. Describes cells having a true nucleus as well as membranebound organelles.
- 11. The movement of substances across a cell membrane without the need for energy.
- 13. Describes cells lacking a true nucleus and membranebound organelles.
- 14. The membranebound region of a eukaryotic cell that contains the genetic material.
- 16. Describes a solution whose solute concentration is greater than the solute concentration of the cytoplasm in a cell.
- 18. A nonpigmented cellular organelle found in plant cells whose functions include storing starches, lipids, and proteins.
- 20. 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.
- 21. The thick fluid inside cells that contains the organelles.
- 22. A group of cells that live and work together. Unlike in a multicellular organism, cells in a colony may break away and survive on their own.
- 24. The movement of substances across a cell membrane from regions of low concentration to regions of low concentration to regions of high concentration by any means that requires the use of energy.
- 27. A whiplike cellular organelle similar in structure to a cillium but longer and used primarily for movement in many bacteria.
- 28. A cellular organism that functions in the organization of microtubules.
- 29. A group of two or more organs that work together to perform a particular function.
- 31. The cellular organelle that directs the proteinbuilding process.
- 34. A cellular organelle that contains digestive enzymes.
- 38. A spherical structure within a eukaryotic cell's nucleus where the ribosomes are manufactured.
- 39. The internal balance within the systems of living organisms that must be kept stable in order to maintain life.
- 40. A protective coating found outside the cell walls of many bacteria.
- 42. A thin layer of phospholids and proteins that defines the boundary of a cell.
- 44. The pressure exerted by water in a full central vacuole upon the cytoplasm and cell membrane of a plant cell; maintains plant rigidity.
Down
- 1. The cellular organelle in which aerobic respiration takes place to release energy from food
- 4. The genetic material of eukaryotic cells consisting of DNA and associated proteins.
- 5. A rigid structure made by cells of plants, fungi, and most bacteria to surround the cell membrane.
- 6. Describes a solution whose solute concentration is equal to the solute concentration in the cytoplasm in a cell.
- 7. The structure within cells that helps define their shape, maintains internal organization, and aids in division and movement
- 8. Transports compounds around the cell and helps maintain the cell's shape; processes fats and breaks down toxic substances in liver cells.
- 9. Describes a solution whose solute concentration is less than the solute concentration of the cytoplasm in a cell.
- 12. An organism consisting of two or more cells and whose cells may not live independently apart from the organism.
- 15. A type of passive transport in which substances can move across a cell membrane through special protein channels embedded in the membrane.
- 17. A group of cells that are specialized to perform a particular function.
- 19. A stack of disk-shaped thylakoids within a chloroplast.
- 23. The diffusion of water molecules through a semipermeable membrane.
- 25. The non membranebound region in prokaryotic cells that contains most of the genetic material.
- 26. A cellular signaling mechanism in which the product of a particular process inhibits the process itself.
- 30. the cellular organelle that processes and packages proteins in preparation for secreting them from a cell
- 32. A cellular organelle found in plant cells that contains the pigment chlorophyll and is the site where photosynthesis takes place.
- 33. A short, hairlike extension of a cell used either for movement or as a sensory organelle.
- 35. Structures found within the cytoplasm of cells that perform the various functions cells need to stay alive.
- 36. An organism consisting of only one cell.
- 37. A cellular signaling mechanism in which the product of a particular process enhances the process itself.
- 41. An organelle in plant cells that holds materials and helps maintain the cell's shape through turgor pressure.
- 43. A structure made of two or more tissues that work together to perform a particular function.