The experiment of Beadle and Tatum aimed to disable an allele of a protein-coding gene required for a particular metabolic activity. This created different "nutritional mutants."
Which statement is most consistent with the one gene, one enzyme hypothesis originally proposed by Beadle and Tatum?
A. Genes and enzymes are important.
B. Every gene encodes a separate enzyme.
C. A gene can only make one enzyme in a cell cycle.
D. Each gene makes one enzyme but not one protein.
E. Every enzyme makes one gene.