Biology Chapter 2: The Chemistry of Life

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Across
  1. 3. A mixture in which particles of a material are more or less evenly dispersed, but not dissolved.
  2. 5. Carbon compound that regulates cell processes; made of amino acids.
  3. 9. 2 or more elements or compounds physically mixed but not chemically combined; can be separated.
  4. 12. Single sugar.
  5. 14. Speeds up the rate of a chemical reaction.
  6. 17. What comes out of a chemical reaction.
  7. 18. A molecule with an uneven distribution of electrons, making one end positive, the other negative.
  8. 20. When one or more electrons are transferred from one atom to the other.
  9. 22. A compound with a pH of 7.
  10. 23. A compound that produces hydroxide ions in solution; has a pH >7.
  11. 24. What goes into the reaction.
  12. 25. smallest unit of most compounds.
  13. 27. The energy needed to start a chemical reaction.
  14. 28. What is being dissolved.
  15. 31. When electrons are shared between two atoms.
  16. 34. Carbon compound that is a major source of energy for most living things.
  17. 35. An atom or group of atoms that has a positive or negative charge.
  18. 38. Attraction between molecules of different substances.
Down
  1. 1. Two or more elements chemically combined.
  2. 2. Mixture in which all components are evenly distributed; one is substance is dissolved in another.
  3. 4. Carbon compound that stores and transmits genetic information: RNA and DNA.
  4. 6. A pure substance with only one type of atom.
  5. 7. Acts like a catalyst in living things because it speeds up reactions in cells.
  6. 8. monomer of protein.
  7. 10. Positively charged part of an atom in the nucleus.
  8. 11. Negatively charged particle of an atom that orbits around the nucleus and is 1/1840 the size of a proton.
  9. 13. Very weak bonds; occurs when a hydrogen atom in one molecule is attracted to the electrostatic atom in another molecule.
  10. 15. Atoms of the same element that have different numbers of neutrons.
  11. 16. process that changes or transforms elements or compounds into another.
  12. 18. Scale with values from 0 to 14, used to measure the concentration of H+ ions in a solution.
  13. 19. The building blocks of matter; the basic unit of matter.
  14. 21. Monomer of nucleic acids made up of a 5-carbon sugar, a phosphate group, and a nitrogenous base.
  15. 26. Attraction between molecules of the same substance.
  16. 29. Large macromolecule formed from monosaccharides.
  17. 30. large molecules formed from many small molecules.
  18. 32. Compound that forms hydrogen ions (H+) in solution; has a pH range < 7.
  19. 33. In a solution, the substance in which the solute dissolves.
  20. 36. Part of atom with no charge in the nucleus.
  21. 37. Energy-rich organic compounds, such as fats, oils, and waxes; made of carbon, hydrogen, and oxygen.