Chapter 2 Cell Structure & Function

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Across
  1. 4. one sugar molecule, two sugar molecules, or a long chain of sugar molecules
  2. 9. the movement of substances through a cell membrane only by using the cell’s energy
  3. 10. the process during which a cell takes in a substance by surrounding it with the cell membrane
  4. 12. a substance that forms by joining many small molecules together
  5. 13. a series of chemical reactions that convert the energy in food molecules into a usable form of energy called ATP
  6. 14. a large macromolecule that does not dissolve in water
  7. 15. a flexible covering that protects the inside of a cell from the environment outside a cell
  8. 17. a process by which glucose, a sugar, is broken down into smaller molecules
  9. 19. a reaction that eukaryotic and prokaryotic cells use to obtain energy from food when oxygen levels are low
  10. 20. the diffusion of water molecules only
  11. 21. the movement of substances from an area of higher concentration to an area of lower concentration
  12. 22. a long chain of amino acid molecules
  13. 23. when molecules pass through a cell membrane using special proteins called transport proteins
Down
  1. 1. a series of chemical reactions that converts light energy, water, and carbon dioxide into the food-energy molecule glucose and gives off oxygen
  2. 2. the process during which a cell’s vesicles release their contents outside the cell
  3. 3. the part of a eukaryotic cell that directs cell activities and contains genetic information stored in DNA
  4. 5. a membrane-surrounded component of a cell that has specialized functions
  5. 6. a membrane-bound organelle that uses light energy and makes food—a sugar called glucose—from water and carbon dioxide in a process known as photosynthesis
  6. 7. a network of threadlike proteins that are joined together
  7. 8. a stiff structure outside the cell membrane
  8. 11. a fluid inside a cell that contains salts and other molecules
  9. 15. states that all living things are made of one or more cells, the cell is the smallest unit of life, and all new cells come from preexisting cells
  10. 16. a macromolecule that forms when long chains of molecules called nucleotides join together
  11. 18. the movement of substances through a cell membrane without using the cell’s energy