Cells and Metabolism

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Across
  1. 7. chemical reactions that break down large organic molecules into smaller ones, with the release of energy
  2. 10. a small membrane-bound cavity in the cytoplasm of a cell
  3. 11. muscle that is not under our conscious control
  4. 12. a molecule upon which an enzyme acts
  5. 14. all chemical reactions occurring in a living organism
  6. 19. a lipid molecule that contains a phosphate group
  7. 20. the site of cellular respiration
  8. 21. the energy required to get a chemical reaction started
  9. 22. the diffusion of water molecules through a semi-permeable membrane
  10. 23. a nerve cell
Down
  1. 1. the process by which a cell surrounds and takes in solid particles
  2. 2. a membrane that forms the external boundary of a celll
  3. 3. tissue providing support for body organs
  4. 4. tissue that forms the outer part of the skin and lines hollow organs
  5. 5. a protein that increases the speed of chemical reactions
  6. 6. the ions or inorganic molecules required by enzymes to catalyse a reaction
  7. 8. a group of cells that are similar in structure and function
  8. 9. large organic molecules made up of fatty acids and glycerol
  9. 10. the transport of materials into or out of a cell in membrane-bound sacs
  10. 13. a difference in concentration of a solution
  11. 15. a molecule that stores energy in cells
  12. 16. the series of reactions that occur in the mitochondria during aerobic respiration; another name for the krebs cycle
  13. 17. a protein that allows ions, water and small molecules to pass through the cell membrane
  14. 18. an enzyme that breaks down fats