THE CELL X-word Puzzle

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Across
  1. 4. Monomers of carbohydrates
  2. 5. Releases H ions when dissolved
  3. 9. Building blocks of matter
  4. 12. Pure substance that can't be broken down
  5. 13. Same element, different # of neutrons
  6. 17. Anything that takes up space and has mass
  7. 19. Center of atom
  8. 20. Atom with electric charge
  9. 21. uniform composition throughout
  10. 22. lowers activation energy
  11. 23. Has positive charge
  12. 26. Negatively charged
  13. 31. starting substances in a rxn
  14. 32. Electrons donated and accepted b/t atoms
  15. 33. substances formed in a rxn
  16. 34. Biological catalyst
  17. 35. Reactants that bind to an enzyme
Down
  1. 1. Responsible for cell membrane
  2. 2. Compound made of small amino acids
  3. 3. atoms held together by covalent bonds
  4. 4. Carbs, Lipids, Proteins, Nucleic acids
  5. 6. single bonds in lipids
  6. 7. Release OH ions when dissolved
  7. 8. Composed of fatty acids and glycerol
  8. 10. electrons shared between two atoms
  9. 11. Neutral charge
  10. 14. Formed when two elements combine
  11. 15. made from repeating monomers
  12. 16. store and transmit genetic info
  13. 18. # of electrons needed to complete shell #2
  14. 24. Vertical Column of periodic table
  15. 25. unequal distribution of charges
  16. 27. components remain distinct
  17. 28. Horizontal rows on periodic table
  18. 29. Has 4 outermost electrons
  19. 30. place where substrate binds to enzyme