By their experimentation using the Neurospora fungus, Beadle and Tatum were able to propose the far -reaching hypothesis that _.

A) several different enzymes may be involved in the same step in a biochemical pathway
B) the role of a specific gene is to produce a specific enzyme
C) genetic recombination occurred in Neurospora
D) prototrophs will grow only if provided with nutritional supplements
E) more than one codon can specify a given amino acid