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5 Written questions

5 Matching questions

  1. solution
  2. electron
  3. nucleus
  4. active site
  5. nucleic acid
  1. a negatively charged particle that occupies space around an atom's nucleus.
  2. b specific place where a substrate binds on an enzyme.
  3. c complex macromolecule that stores and communicates genetic information.
  4. d center of an atom; contains neutrons and protons. In eukaryotic cells, the central membrane-bound organelle that manages cellular functions and contains DNA
  5. e homogeneous mixture formed when a substance (the solute) is dissolved in another substance (the solvent).

5 Multiple choice questions

  1. compound whose atoms are held together by covalent bonds
  2. two or more atoms of the same element having different numbers of neutrons.
  3. pure substance with unique properties; formed when two or more different elements combine.
  4. particle without a charge in an atom's nucleus
  5. organic compound containing carbon, hydrogen, and oxygen in a ratio of on oxygen and two hydrogen atoms for each carbon atom.

5 True/False questions

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


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


  3. polymersubstance dissolved in a solvent.


  4. reactantsubstance that exists before a chemical reaction starts; located on the left side of the arrow in a chemical reaction.


  5. mixturecombination 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).


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