chapter 2: chemistry of life

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Across
  1. 1. / a macromolecule made of many monomers bonded together.
  2. 3. / a substance that decreases the activation energy needed to start a chemical reaction, and increases the rate of the chemical reaction.
  3. 6. / one particular type of atom, and it cannot be broken down into a simpler substance by ordinary chemical means.
  4. 8. / a compound that releases a proton when it dissolves in water.
  5. 12. / forms when atoms share a pair of electrons.
  6. 13. / a substance made of atoms of different elements bonded together in a certain ratio.
  7. 14. / a chemical reaction releases more energy than it absorbs.
  8. 15. / an atom that has gained or lost one or more electrons.
  9. 17. / the attraction among molecules stick to each other.
  10. 18. / change substances into different substances by breaking and forming chemical bonds.
  11. 20. / the amount of energy that will break a bond between two atoms.
  12. 23. / catalysts for chemical reactions in living things.
  13. 25. / a chemical reaction absorbs more energy than it releases.
  14. 26. / molecules that contain carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur.
  15. 28. / chains of carbon atoms bonded to hydrogen atoms.
  16. 29. / compounds that remove H+ ions from a solution.
  17. 30. / the specific reactants that an enzyme acts one.
  18. 31. / a homogeneous mixture.
Down
  1. 2. / two or more atoms held together by covalent bonds.
  2. 4. / the amount of energy that needs to be absorbed for a chemical reaction to start.
  3. 5. / the substance that is present in the greater amount and that dissolves another substance.
  4. 7. / reached when both the reactants and products are made at the same rate.
  5. 9. / forms through the electrical force between oppositely charged ions.
  6. 10. / polymers that are made up of monomers called nucleotides.
  7. 11. / each subunit in the complete molecule.
  8. 16. / a polymer made of monomers called amino acids.
  9. 19. / molecules composed of carbon, hydrogen, and oxygen, and they include sugars and starches.
  10. 21. / The smallest basic unit of matter.
  11. 22. / nonpolar molecules that include fats, oils, and cholesterol.
  12. 24. / a substance that dissolves in a solvent.
  13. 27. / the attraction among molecules of different substances.