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5 Written questions

5 Matching questions

  1. pH
  2. active site
  3. nucleotide
  4. neutron
  5. reactant
  1. a a subunit of nucleic acid formed from a single sugar, a phosphate group, and a nitrogenous base.
  2. b substance that exists before a chemical reaction starts; located on the left side of the arrow in a chemical reaction.
  3. c specific place where a substrate binds on an enzyme.
  4. d measure of the concentration of hydrogen ions (H+) in a solution.
  5. e particle without a charge in an atom's nucleus

5 Multiple choice questions

  1. negatively charged particle that occupies space around an atom's nucleus.
  2. organic compound made of amino acids joined by peptide bonds; primary building block of organisms.
  3. large molecule formed by joining smaller organic molecules together
  4. positively charged particle in an atom's nucleus.
  5. electrical attraction between two oppositely charged atoms or groups of atoms.

5 True/False questions

  1. elementsubstance in which another substance is dissolved.


  2. productsubstance formed by a chemical reaction; located on the right side of the arrow in a chemical equation.


  3. enzymelarge molecule formed from smaller repeating units or identical, or nearly identical, compounds linked by covalent bonds.


  4. solutesubstance dissolved in a solvent.


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