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of 36 available terms

5 Written Questions

5 Matching Questions

  1. amino acid
  2. electron
  3. pH
  4. reactant
  5. enzyme
  1. a measure of the concentration of hydrogen ions (H+) in a solution.
  2. b negatively charged particle that occupies space around an atom's nucleus.
  3. c substance that exists before a chemical reaction starts; located on the left side of the arrow in a chemical reaction.
  4. d carbon compound joined by peptide bonds; building block of proteins.
  5. e protein that speeds up a biological reaction by lowering the activation energy needed to start the reaction

5 Multiple Choice Questions

  1. center of an atom; contains neutrons and protons. In eukaryotic cells, the central membrane-bound organelle that manages cellular functions and contains DNA
  2. electrical attraction between two oppositely charged atoms or groups of atoms.
  3. energy-requiring process by which atoms or groups of atoms in substances are changed into different substances
  4. substance that releases hydroxide ions (OH-) when dissolved in water; a basic solution has a pH greater than 7.
  5. type of chemical bond formed when atoms share electrons.

5 True/False Questions

  1. active sitespecific place where a substrate binds on an enzyme.


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


  3. isotopesubstance dissolved in a solvent.


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


  5. solventsubstance in which another substance is dissolved.


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