Ch. 2: Cells Vocabulary

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Across
  1. 4. process during which a cell’s vesicles release their contents outside the cell
  2. 5. fluid inside a cell that contains salts and other molecules
  3. 8. movement of substances through a cell membrane without using energy
  4. 11. one or more sugar molecules
  5. 13. large macromolecule that does not dissolve in water
  6. 16. network of threadlike proteins inside a cell
  7. 17. substance that forms by joining many small molecules
  8. 18. outer covering
  9. 19. membrane-bound organelle that uses light energy and makes food
  10. 20. protects the inside of a cell from the environment
  11. 21. macromolecule that forms when a long chain of nucleotides join together
  12. 22. long chain of amino acid molecules
  13. 24. when molecules pass through a cell membrane using transport proteins
  14. 25. reaction used to obtain energy from food when oxygen levels are low
Down
  1. 1. movement of substances through a cell membrane using the cell’s energy
  2. 2. process by which glucose is broken down
  3. 3. process during which a cell takes in a substance by surrounding it with the cell membrane
  4. 6. membrane-bound cell structure with a specialized function
  5. 7. diffusion of water molecules only through a membrane
  6. 9. living things are made of one or more cells; the cell is the smallest unit of life; new cells come from preexisting cells
  7. 10. purpose for which something is used
  8. 12. movement from an area of higher concentration to an area of lower concentration
  9. 14. stiff structure outside the cell membrane
  10. 15. series of reactions that convert light energy, water, and CO2 into glucose and give off oxygen
  11. 16. series of chemical reactions that convert energy in food molecules into ATP
  12. 21. directs all cell activities and contains DNA
  13. 23. explanation based on scientific knowledge resulting from several observations and experiments