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5 Written questions

5 Matching questions

  1. molecule
  2. substrate
  3. pH
  4. proton
  5. polymer
  1. a measure of the concentration of hydrogen ions (H+) in a solution.
  2. b compound whose atoms are held together by covalent bonds
  3. c positively charged particle in an atom's nucleus.
  4. d reactant to which an enzyme binds
  5. e large molecule formed from smaller repeating units or identical, or nearly identical, compounds linked by covalent bonds.

5 Multiple choice questions

  1. protein that speeds up a biological reaction by lowering the activation energy needed to start the reaction
  2. 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).
  3. substance that speeds up a chemical reaction by reducing the activation energy.
  4. building block of matter; contains subatomic particles—neutrons, protons, and electrons
  5. specific place where a substrate binds on an enzyme.

5 True/False questions

  1. macromoleculelarge molecule formed by joining smaller organic molecules together


  2. proteinorganic compound made of amino acids joined by peptide bonds; primary building block of organisms.


  3. polar moleculelarge molecule formed by joining smaller organic molecules together


  4. compoundsubstance in which another substance is dissolved.


  5. chemical reactionenergy-requiring process by which atoms or groups of atoms in substances are changed into different substances


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