By their experimentation using the Neurospora fungus, Beadle and Tatum were able to propose the far-reaching hypothesis that ________.
◦ genetic recombination occurred in Neurospora
◦ several different enzymes may be involved in the same step in a biochemical pathway
◦ the role of a specific gene is to produce a specific enzyme
◦ more than one codon can specify a given amino acid
◦ prototrophs will grow only if provided with nutritional supplements