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5 Written questions

5 Matching questions

  1. pH
  2. reactant
  3. substrate
  4. molecule
  5. catalyst
  1. a substance that speeds up a chemical reaction by reducing the activation energy.
  2. b substance that exists before a chemical reaction starts; located on the left side of the arrow in a chemical reaction.
  3. c reactant to which an enzyme binds
  4. d measure of the concentration of hydrogen ions (H+) in a solution.
  5. e compound whose atoms are held together by covalent bonds

5 Multiple choice questions

  1. a subunit of nucleic acid formed from a single sugar, a phosphate group, and a nitrogenous base.
  2. particle without a charge in an atom's nucleus
  3. substance dissolved in a solvent.
  4. substance that releases hydroxide ions (OH-) when dissolved in water; a basic solution has a pH greater than 7.
  5. energy-requiring process by which atoms or groups of atoms in substances are changed into different substances

5 True/False questions

  1. ionbuilding block of matter; contains subatomic particles—neutrons, protons, and electrons


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


  3. solventpure substance composed of only one type of atom; cannot be broken down into another substance by physical or chemical means


  4. isotopepositively charged particle in an atom's nucleus.


  5. ionic bondhomogeneous mixture formed when a substance (the solute) is dissolved in another substance (the solvent).