Examine basic experimental techniques applied to selected bacteriophages and animal viruses. Four laboratory hours and one discussion hour a week for one semester. Biology 230L and Molecular Biosciences 230L may not both be counted. Prerequisite: Molecular Biosciences 226L (or Biology 226L) with a grade of at least C-, and credit with a grade of at least C- or registration for Molecular Biosciences 330 (or credit with a grade of at least C- in Biology 330).