Across
- 6. Region where the cell's microtubules are initiated; contains a pair of centrioles
- 7. Produces a usable form of energy (ATP) for the cell
- 8. Membrane enclosing the cell
- 10. Double membrane enclosing the nucleus
- 13. Many cells secrete proteins that are produced by ribosomes
- 15. Sticky layer made mostly of collagen that holds animal cells together
- 16. Projections that increase the cell's surface area
- 17. Organelle active in synthesis, modification, sorting, and secretion of cell products
- 18. Produces hydrogen peroxide as a by-product and then converts it to water
- 19. Material consisting of DNA and proteins
- 20. Cell control center
- 22. Motility structure present in some animal cells
- 24. Reinforces cell's shape, functions in cell movement
Down
- 1. Lipids manufactured here; breaks down drugs and toxin in liver
- 2. Changes in cell shape; muscle contraction; cytoplasmic streaming in plant cells
- 3. Anchorage of nucleus and certain other organelles
- 4. Sac of digestive enzymes (macromolecules are hydrolyzed)
- 5. The region of the cell between the plasma membrane and the nucleus
- 9. Maintenance of cell shape; cell motility; chromosome movements in cell division
- 11. Cytoplasmic channels through cell walls that connect the cytoplams of adjacent cells
- 12. May store water, needed chemicals and wastes in plant cells
- 14. Photosynthetic organelle; converts energy of sunlight to chemical energy stored in sugar molecules
- 21. Small structure that makes protein
- 23. Rigid covering of a plant cell; maintains cell's shape and protects cell from damage