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5 Written questions

5 Matching questions

  1. molecule
  2. polymer
  3. isotope
  4. substrate
  5. amino acid
  1. a carbon compound joined by peptide bonds; building block of proteins.
  2. b large molecule formed from smaller repeating units or identical, or nearly identical, compounds linked by covalent bonds.
  3. c compound whose atoms are held together by covalent bonds
  4. d two or more atoms of the same element having different numbers of neutrons.
  5. e reactant to which an enzyme binds

5 Multiple choice questions

  1. particle without a charge in an atom's nucleus
  2. positively charged particle in an atom's nucleus.
  3. electrical attraction between two oppositely charged atoms or groups of atoms.
  4. type of chemical bond formed when atoms share electrons.
  5. pure substance with unique properties; formed when two or more different elements combine.

5 True/False questions

  1. basemeasure of the concentration of hydrogen ions (H+) in a solution.

          

  2. reactantpure substance composed of only one type of atom; cannot be broken down into another substance by physical or chemical means

          

  3. solutehomogeneous mixture formed when a substance (the solute) is dissolved in another substance (the solvent).

          

  4. active sitesubstance in which another substance is dissolved.

          

  5. carbohydrateorganic compound containing carbon, hydrogen, and oxygen in a ratio of on oxygen and two hydrogen atoms for each carbon atom.