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5 Written questions

5 Matching questions

  1. isotope
  2. molecule
  3. product
  4. nucleic acid
  5. substrate
  1. a substance formed by a chemical reaction; located on the right side of the arrow in a chemical equation.
  2. b reactant to which an enzyme binds
  3. c complex macromolecule that stores and communicates genetic information.
  4. d compound whose atoms are held together by covalent bonds
  5. e two or more atoms of the same element having different numbers of neutrons.

5 Multiple choice questions

  1. substance that exists before a chemical reaction starts; located on the left side of the arrow in a chemical reaction.
  2. substance in which another substance is dissolved.
  3. substance that releases hydrogen ions (H+) when dissolved in water; an acidic solution has a pH less than 7.
  4. homogeneous mixture formed when a substance (the solute) is dissolved in another substance (the solvent).
  5. electrical attraction between two oppositely charged atoms or groups of atoms.

5 True/False questions

  1. catalystsubstance that speeds up a chemical reaction by reducing the activation energy.

          

  2. carbohydratereactant to which an enzyme binds

          

  3. elementsubstance in which another substance is dissolved.

          

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

          

  5. lipidhydrophobic biological molecule composed mostly or carbon and hydrogen; fats, oils, and waxes are lipids

          

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