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5 Written Questions

5 Matching Questions

  1. buffer
  2. mixture
  3. neutron
  4. solvent
  5. ion
  1. a combination of two or more different substances in which each substance keeps its individual characteristics; can have a uniform composition (homogeneous) or have distinct areas of substances (heterogeneous).
  2. b mixture that can react with an acid or a base to maintain the pH within a specific range.
  3. c atom that is negatively or positively charged because it have lost or gained one or more electrons.
  4. d substance in which another substance is dissolved.
  5. e particle without a charge in an atom's nucleus

5 Multiple Choice Questions

  1. specific place where a substrate binds on an enzyme.
  2. type of chemical bond formed when atoms share electrons.
  3. compound whose atoms are held together by covalent bonds
  4. protein that speeds up a biological reaction by lowering the activation energy needed to start the reaction
  5. reactant to which an enzyme binds

5 True/False Questions

  1. carbohydrateorganic compound containing carbon, hydrogen, and oxygen in a ratio of on oxygen and two hydrogen atoms for each carbon atom.


  2. elementsubstance in which another substance is dissolved.


  3. amino acidsubstance that releases hydrogen ions (H+) when dissolved in water; an acidic solution has a pH less than 7.


  4. nucleusa subunit of nucleic acid formed from a single sugar, a phosphate group, and a nitrogenous base.


  5. basesubstance that releases hydroxide ions (OH-) when dissolved in water; a basic solution has a pH greater than 7.


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