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5 Written questions

5 Matching questions

  1. polymer
  2. compound
  3. nucleus
  4. atom
  5. product
  1. a substance formed by a chemical reaction; located on the right side of the arrow in a chemical equation.
  2. b pure substance with unique properties; formed when two or more different elements combine.
  3. c building block of matter; contains subatomic particles—neutrons, protons, and electrons
  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 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. molecule with oppositely charged regions
  3. specific place where a substrate binds on an enzyme.
  4. pure substance composed of only one type of atom; cannot be broken down into another substance by physical or chemical means
  5. complex macromolecule that stores and communicates genetic information.

5 True/False questions

  1. solventsubstance in which another substance is dissolved.


  2. mixturetwo or more atoms of the same element having different numbers of neutrons.


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


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


  5. substratereactant to which an enzyme binds