Across
- 1. carbohydrate that makes up the cell wall of plants
- 3. respiration in a cell without oxygen
- 8. this occurs when an enzyme is destroyed by too high a temperature
- 9. thin layer of "skin" on the outside of all cells
- 10. respiration in a cell which requires oxygen
- 12. the energy currency of a cell, known as ATP
- 16. produced during anaerobic respiration
- 18. special type of diffusion involving water molecules
- 20. organelles that synthesize proteins and are called the "protein builders" of the cell
- 21. the living material found in all cells
- 22. found in plant cells, they absorb light energy and contain a green pigment
Down
- 1. the green pigment in the chloroplasts
- 2. liquid found in the vacuole of plant cells
- 4. the substance the enzyme acts upon and which attaches itself to the active site
- 5. cell membranes are this, meaning they allow some substances to pass through them but not others
- 6. biological catalysts found in cells which speed up chemical reactions
- 7. movement of particles from an area of high concentration to one of low concentration
- 11. large central space in plant cells
- 12. movement of particles agaisnt a concentration gradient which requires energy
- 13. network of membranes found throughout the cytoplasm
- 14. the largest organelle in a cell which controls the activities of the cell, found in most cells but not all
- 15. small areas on the surface of enzymes where chemical reactions take place
- 17. found outside the cell membrane in plant cells
- 19. orgenelles that release most of the energy from respiration in cells