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5 Written questions

5 Matching questions

  1. mixture
  2. product
  3. atom
  4. enzyme
  5. electron
  1. a substance formed by a chemical reaction; located on the right side of the arrow in a chemical equation.
  2. b 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. c negatively charged particle that occupies space around an atom's nucleus.
  4. d building block of matter; contains subatomic particles—neutrons, protons, and electrons
  5. e protein that speeds up a biological reaction by lowering the activation energy needed to start the reaction

5 Multiple choice questions

  1. large molecule formed from smaller repeating units or identical, or nearly identical, compounds linked by covalent bonds.
  2. mixture that can react with an acid or a base to maintain the pH within a specific range.
  3. organic compound containing carbon, hydrogen, and oxygen in a ratio of on oxygen and two hydrogen atoms for each carbon atom.
  4. substance dissolved in a solvent.
  5. reactant to which an enzyme binds

5 True/False questions

  1. nucleotidea subunit of nucleic acid formed from a single sugar, a phosphate group, and a nitrogenous base.


  2. compoundpure substance with unique properties; formed when two or more different elements combine.


  3. amino acidcarbon compound joined by peptide bonds; building block of proteins.


  4. ionic bondtype of chemical bond formed when atoms share electrons.


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