Unit 2

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Across
  1. 2. formed by combined cells (ex. bone tissue)
  2. 6. formed by all organs combined (ex. digestive system)
  3. 7. the smallest unit of matter, makes up everything
  4. 11. loves (attracts) water
  5. 13. only allowing certain molecules in or out of the cell
  6. 15. formed by combined tissues (ex. heart)
  7. 18. a method of moving molecules across the membrane that does not require any energy (ATP)
  8. 19. the basic unit of life (formed by combined organelles)
  9. 20. the place on an enzyme that the substrate fits into
Down
  1. 1. once the reaction has taken place, the sustrate converts into the ___
  2. 3. special proteins that lower the amount of activation energy needed, speeding up chemical reactions
  3. 4. when a cell spends energy (ATP) to move molecules across a membrane through a transport protein
  4. 5. hates (repels) water
  5. 7. energy required to active a reaction
  6. 8. when an enzyme's active site is changed
  7. 9. formed by combined atoms (ex. protein)
  8. 10. a molecule containing one hydrophilic head and two hydrophobic tails, forms the phospholipid bilayer
  9. 12. the thing that latches onto the active site of an enzyme to create products
  10. 14. molecules naturally moving from being packed together to spaced out
  11. 15. formed by all organ systems combined (ex. fox)
  12. 16. formed by combined molecules (ex. nucleus)
  13. 17. the diffusion of water across a membrane