Various Techniques Have Been Developed to Isolate Strains of Bacteria

Multiple Choice

Various techniques have been developed to isolate strains of bacteria carrying a particular mutation.One of them is, bacteria containing wild-type cells and cells of a desired mutant are grown on a medium lacking the nutrient for which the desired mutants are auxotrophic but containing an antibiotic that only kills growing cells.In this environment,

A) both wild-type and mutant cells are killed.
B) both wild-type and mutant cells survive.
C) wild-type cells survive; mutant cells die.
D) wild-type cells die; mutant cells survive.