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of 36 available terms

5 Written Questions

5 Matching Questions

  1. acid
  2. nucleic acid
  3. polar molecule
  4. electron
  5. element
  1. a negatively charged particle that occupies space around an atom's nucleus.
  2. b substance that releases hydrogen ions (H+) when dissolved in water; an acidic solution has a pH less than 7.
  3. c molecule with oppositely charged regions
  4. d pure substance composed of only one type of atom; cannot be broken down into another substance by physical or chemical means
  5. e complex macromolecule that stores and communicates genetic information.

5 Multiple Choice Questions

  1. substance that speeds up a chemical reaction by reducing the activation energy.
  2. substance that exists before a chemical reaction starts; located on the left side of the arrow in a chemical reaction.
  3. specific place where a substrate binds on an enzyme.
  4. electrical attraction between two oppositely charged atoms or groups of atoms.
  5. two or more atoms of the same element having different numbers of neutrons.

5 True/False Questions

  1. covalent bondelectrical attraction between two oppositely charged atoms or groups of atoms.


  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. mixturecompound whose atoms are held together by covalent bonds


  5. ionatom that is negatively or positively charged because it have lost or gained one or more electrons.


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