Biology Ch 2 Vocabulary

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